Today we will analyze what units of length are used in measurements.

centimeter and millimeter

But first, let's look at the main tool used by schoolchildren - ruler.

Look at the drawing. The minimum price of division of the line - millimeter. Designated: mm. The centimeter is indicated by large divisions. There are 10 millimeters in one centimeter.

The centimeter is divided in half, five millimeters each, by a smaller division. Centimeter referred to as: see

To measure a segment, the ruler is attached with a zero division to the beginning of the measured segment, as shown in the figure. The division at which the segment ends is the length of this segment. The length of the segment in the figure is 5 cm or 50 mm.

The following figure shows a 5 cm 6 mm, or 56 mm, length.

Let's look at a few examples of converting different units of length:

For example, we need to convert 1 m 30 cm to centimeters. We know that 1 meter is 100 centimeters. It turns out:

100cm + 30cm = 130cm

For the reverse translation, we separate a hundred centimeters - this is 1m and another 30 cm remains. Answer: 1m 30cm.

If we want to express centimeters in millimeters, remember that 1 centimeter is 10 millimeters.

For example, let's convert 28 cm to millimeters: 28 × 10 = 280

So in 28 cm - 280 mm.

Meter

The basic unit of length is meter. The remaining units of measurement are formed from the meter using Latin prefixes. For example, in the word centimeter The Latin prefix centi means one hundred, which means there are one hundred centimeters in one meter. In the word millimeter - the prefix milli - thousand, which means that there are a thousand millimeters in one meter.

Ten centimeters is 1 decimeter. Designated: dm. There are 10 decimeters in 1 meter

Expressed in centimeters:

1 dm = 10 cm

4 dm = 40 cm

3 dm 4 cm = 30 cm + 4 cm = 34 cm

1 m 2 dm 5 cm = 100 cm + 20 cm + 5 cm = 125 cm

Now let's express it in decimeters:

1 m = 10 dm

4 m 8 dm = 48 dm

20 cm = 2 dm

So many different types measurements and how to compare the length of different segments, if the first segment is 5 cm long 10 mm, and the second 10 dm. In our problem, the main rule for comparing quantities will help to understand:

To compare measurement results, you need to express them in the same units of measurement.

So, let's translate the length of our segments into centimeters:

5 cm 10 mm = 51 cm

10 dm = 100 cm

51 cm< 100 см

So the second segment is longer than the first.

Kilometer

Long distances are measured in kilometers. AT 1 kilometer - 1000 meters. Word kilometer formed using the Greek prefix kilo - 1000.

Let's express kilometers in meters:

3 km = 3000 m

23 km = 23000 m

And back:

2400 m = 2 km 400 m

7650 m = 7 km 650 m

So, let's bring all the units of measurement into one table:

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1 meter [m] = 10 decimeter [dm]

Initial value

Converted value

meter exameter petameter terameter gigameter megameter kilometer hectometer decameter decimeter centimeter millimeter micrometer micron nanometer picometer femtometer attometer megaparsec kiloparsec parsec light year astronomical unit (international) mile (statute) mile (US, geodetic) mile (Roman) 1000 yards furlong furlong (US, geodetic) chain chain (US, geodetic) rope (eng. rope) genus genus (US, geodetic) perch field (eng. . pole) fathom fathom (US, geodetic) cubit yard foot foot (US, geodetic) link link (US, geodetic) cubit (Brit.) hand span finger nail inch inch (US, geodetic) barleycorn (eng. barleycorn) thousandth of a microinch angstrom atomic length unit x-unit fermi arpan soldering typographic point twip cubit (Swedish) fathom (Swedish) caliber centiinch ken arshin actus (O.R.) vara de tarea vara conu quera vara castellana cubit (Greek) long reed reed long cubit palm "finger" Planck length classical electron radius Bohr radius equatorial radius of the Earth polar radius of the Earth distance from the Earth to the Sun radius of the Sun light nanosecond light microsecond light millisecond light second light hour light days light week Billion light-years Distance from the Earth to the Moon cable lengths (international) cable lengths (British) cable lengths (USA) nautical mile (USA) light minute rack unit horizontal pitch cicero pixel line inch (Russian) vershok span foot fathom oblique fathom verst boundary verst

Converter feet and inches to meters and vice versa

foot inch

m

More about length and distance

General information

Length is largest dimension body. In three dimensions, length is usually measured horizontally.

Distance is a measure of how far two bodies are from each other.

Distance and length measurement

Distance and length units

In the SI system, length is measured in meters. Derived quantities such as kilometer (1000 meters) and centimeter (1/100 meter) are also widely used in the metric system. In countries that do not use the metric system, such as the US and the UK, units such as inches, feet, and miles are used.

Distance in physics and biology

In biology and physics, lengths are often measured much less than one millimeter. For this, a special value, a micrometer, has been adopted. One micrometer is equal to 1×10⁻⁶ meters. In biology, micrometers measure the size of microorganisms and cells, and in physics, the length of infrared electromagnetic radiation. A micrometer is also called a micron and sometimes, especially in English literature, is denoted by the Greek letter µ. Other derivatives of the meter are also widely used: nanometers (1×10⁻⁹ meters), picometers (1×10⁻¹² meters), femtometers (1×10⁻¹⁵ meters), and attometers (1×10⁻¹⁸ meters).

Distance in navigation

Shipping uses nautical miles. One nautical mile is equal to 1852 meters. Initially, it was measured as an arc of one minute along the meridian, that is, 1/(60 × 180) of the meridian. This made latitude calculations easier, since 60 nautical miles equaled one degree of latitude. When distance is measured in nautical miles, speed is often measured in nautical knots. One knot is equal to one nautical mile per hour.

distance in astronomy

In astronomy, long distances are measured, so special quantities are adopted to facilitate calculations.

astronomical unit(au, au) is equal to 149,597,870,700 meters. The value of one astronomical unit is a constant, that is, a constant value. It is generally accepted that the Earth is located at a distance of one astronomical unit from the Sun.

Light year equals 10,000,000,000,000 or 10¹³ kilometers. This is the distance that light travels in a vacuum in one Julian year. This value is used in popular science literature more often than in physics and astronomy.

Parsec approximately equal to 30,856,775,814,671,900 meters or approximately 3.09 × 10¹³ kilometers. One parsec is the distance from the Sun to another astronomical object, such as a planet, star, moon, or asteroid, with an angle of one arc second. One arc second is 1/3600 of a degree, or about 4.8481368 mrad in radians. Parsec can be calculated using parallax - the effect of a visible change in the position of the body, depending on the point of observation. During measurements, a segment E1A2 (in the illustration) is laid from the Earth (point E1) to a star or other astronomical object (point A2). Six months later, when the Sun is on the other side of the Earth, a new segment E2A1 is drawn from the new position of the Earth (point E2) to the new position in space of the same astronomical object (point A1). In this case, the Sun will be at the intersection of these two segments, at point S. The length of each of the segments E1S and E2S is equal to one astronomical unit. If we postpone the segment through the point S, perpendicular to E1E2, it will pass through the intersection point of the segments E1A2 and E2A1, I. The distance from the Sun to point I is the SI segment, it is equal to one parsec when the angle between the segments A1I and A2I is two arcseconds.

On the picture:

• A1, A2: apparent star position
• E1, E2: Earth position
• S: position of the sun
• I: point of intersection
• IS = 1 parsec
• ∠P or ∠XIA2: parallax angle
• ∠P = 1 arc second

Other units

league- an obsolete unit of length used earlier in many countries. It is still used in some places, such as the Yucatan Peninsula and rural areas of Mexico. This is the distance a person walks in an hour. Marine League - three nautical miles, approximately 5.6 kilometers. Lie - a unit approximately equal to the league. AT English language both leagues and leagues are called the same, league. In literature, the league is sometimes found in the title of books, such as "20,000 Leagues Under the Sea" - the famous novel by Jules Verne.

Elbow- an old value equal to the distance from the tip of the middle finger to the elbow. This value was widespread in the ancient world, in the Middle Ages, and until modern times.

Yard used in the British imperial system and is equal to three feet or 0.9144 meters. In some countries, such as Canada, where the metric system is adopted, yards are used to measure the fabric and length of swimming pools and sports fields and grounds, such as golf and football courses.

Meter Definition

The definition of the meter has changed several times. The meter was originally defined as 1/10,000,000 of the distance from the North Pole to the equator. Later, the meter was equal to the length of the platinum-iridium standard. Later, the meter was equated to the wavelength of the orange line of the electromagnetic spectrum of the krypton atom ⁸⁶Kr in vacuum, multiplied by 1,650,763.73. Today, a meter is defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second.

Computing

In geometry, the distance between two points, A and B, with coordinates A(x₁, y₁) and B(x₂, y₂) is calculated by the formula:

and within a few minutes you will receive an answer.

Calculations for converting units in the converter " Length and distance converter' are performed using the functions of unitconversion.org .

How to convert meters to decimeters?

How many decimeters are in one meter?

Therefore, to convert meters to decimeters, you need to multiply the number of meters by 10:

We will consider the conversion of meters to decimeters with specific examples.

Express meters in decimeters:

1) 4 meters;

2) 12 meters;

3) 30 meters;

4) 5.2 meters;

5) 25 meters 7 decimeters.

The following notation is used to shorten the notation:

1 meter = 1 m;

1 decimeter = 1 dm.

To convert meters to decimeters, multiply the number of meters by 10:

1) 4 m=4∙10 dm=40 dm;

2) 12 m=12∙10 dm=120 dm;

3) 30 m=30∙10 dm=300 dm;

4) 5.2 m=5.2∙10 dm=52 dm;

5) 25 m 7 dm = 25∙10 + 7 dm = 257 dm.

Svetlana MikhailovnaUnits of measurement

To find out how many decimeter meters should use a simple web calculator. In the left field, enter the number of counters you want to convert for conversion.

In the field on the right you will see the result of the calculation.

Meter per decimeter

To convert counters or decimeters to other units, just click on the appropriate link.

What is "meter"

The meter (m, m) is one of the seven basic units of the international system (SI), which is also included in the ISS ISCA, ICSC, investor compensation schemes, ISC, ICSI, ICC and MTS. The counter is the distance traveled by light in vacuum for 1/299,792,458 seconds.

The definition, adopted in 1983 by the General Conference on Weights and Measures, means that the term "meter" is related to the second by a universal constant (the speed of light).

For a long time in Europe there were no standard measures for determining the length.

In the 17th century, there was an urgent need for unification. century. With the development of science, the search for a measure based on a natural phenomenon began to allow the decimal system to be calculated. Then the "Catholic meter" of the Italian scientist Tito Livio Burattini was adopted.

In 1960, from the control male and dropped to 1983. The gauge was at 1650763.73 wavelengths of the orange line (6056 nm) in the krypton range of the 86Kr isotope in vacuum.

Currently this prototype is not useful. Since the mid-1970s, when the speed of light has become as accurate as possible, it has been decided that the existing concept of the meter is related to the speed of light in a vacuum.

What is a "decimeter"?

Distance unit in the International System of Units (SI) One decimeter is equal to one tenth of a meter.

Russian brand - dm, international - dm. There are 10 centimeters and 100 millimeters in a decimeter.

How much is it in decimeters

Unit weight
1 t =	10 centers	1000 kg	1000 000 g	1000,000,000 mg
1 c =	100 kg	100 000 g	100,000,000 mg
1 kg =	1000g	1000 mg
1 g =	1000 mg

How many dm is 1 meter?

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How many decimeters in 1 meter (how many dm in 1 m)?

According to international system measures and weights in 1 meter 10 decimeters.

Online calculator for converting meters to decimeters.

Converting units of length, mass, time, information and their derivatives is a fairly simple task.

For these purposes, the engineers of our company have developed universal calculators for the mutual conversion of various units of measurement between themselves.

Universal unit calculators:

Length unit calculator
- mass unit calculator
- area unit calculator
- volume unit calculator
- time unit calculator

Theoretical and practical concepts of converting one unit of measurement to another are based on the centuries-old experience of mankind's scientific research in applied fields of knowledge.

Theory:

Mass is a characteristic of a body, which is a measure of the gravitational interaction with other bodies.

Length is the numerical value of the length of a line (not necessarily a straight line) from the starting point to the end point.

Time is a measure of the flow of physical processes of a sequential change in their state, which in practice proceeds in one direction continuously.

Information is a form of information in any representation (regarding the calculation, mainly in digital form).

Practice:

This page provides the simplest answer to the question of how many decimeters are in 1 meter.

One meter is equal to 10 decimetres.

MEASURES OF LENGTH or LINEAR
MASS MEASURES
AREA MEASURES
1 sq. decimeter (sq. dm) = 100 sq. centimeters (sq. cm) = 10,000 sq. millimeters (sq. mm.) 1 ar (a) \u003d 100 square meters. meters (sq. m)
VOLUME MEASURES
1 cu. decimeter to centimeter meter (cubic meters) \u003d 1,000 cubic meters. decimeters = 1,000,000 cu. centimeters (cc) 1 liter (l) = 1000 milliliters (ml)

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• Thermal properties of substances
  
• Density of gases and vapors
  
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Measures of length, area, mass, volume

The table shows measures of length, area, mass, volume, as well as ratios for translation.

MEASURES OF LENGTH or LINEAR
1 kilometer (km) = 1,000 meters (m) 1 meter (m) = 10 decimeters (dm) = 100 centimeters (cm) 1 decimeter (dm) = 10 centimeters (cm) 1 centimeter (cm) = 10 millimeters (mm)
MASS MEASURES
1 ton (t) = 1,000 kilograms (kg) 1 centner (c) = 100 kilograms (kg) 1 kilogram (kg) = 1,000 grams (g) 1 gram (g) = 1,000 milligrams (mg)
AREA MEASURES
1 sq. kilometer (sq. km) = 1,000,000 sq. meters (sq. m) 1 sq. meter (sq. m) = 100 sq. decimeters (sq. dm) = 10,000 sq. centimeters (sq. cm) 1 sq. decimeter (sq. How many meters in dm dm) = 100 sq. centimeters (sq. cm) = 10,000 sq. millimeters (sq. mm.) 1 hectare (ha) = 100 ares (a) = 10,000 sq. meters (sq. m) 1 ar (a) \u003d 100 square meters. meters (sq. m)
VOLUME MEASURES
1 cu. meter (cubic meters) \u003d 1,000 cubic meters. decimeters = 1,000,000 cu. centimeters (cc) 1 cu. decimeter (cubic dm) = 1,000 cubic meters centimeters (cc) = 1,000,000 cu. millimeters (cu. mm) 1 liter (l) = 1 cu. decimeter (cubic dm) 1 hectoliter (hl) = 100 liters (l) 1 liter (l) = 1000 milliliters (ml)

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  The table shows the specific heat of combustion for gasoline, wood, diesel fuel, coal, kerosene, gunpowder, alcohol, jet fuel (TS-1).
• Anglo-American system of measures
  Anglo-American measures of length, area and volume: nautical, English, international, geographic miles, inch, foot, yard, weave, hectare, acre, grain, carat, troy ounce, pound, cental, short, long and register tons, pint , quart, gallon, barrel, bushel.
• Thermal properties of substances
  The table shows specific heat capacity, melting point, specific heat of fusion for solids, specific heat capacity, boiling point, specific heat of vaporization for liquids and specific heat capacity, condensation temperature for gases.
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How many liters in one cube of water?

To answer similar question, it is necessary to understand the following. To begin with, let's define what is 1 liter and what is it equal to.

1 l \u003d 1 dm3 \u003d 0.001 m3, which means that 1 liter will be equal to 1 cubic decimeter.

Moreover, this equality makes sense for normal atmospheric pressure(760 mm Hg), and a temperature equal to 3.980C (the temperature at which water has the highest density);

Let's determine the volume of the cube. To do this, we multiply all its faces. As a result, we will have 1000 dm3 or 1000 liters of water (at 760 mm Hg and a temperature of 3.980C).

Answer:1 m3 (cube) of H2O contains 1000 liters!

And now we will write answers to interesting questions from users!

How many liters of diesel fuel in one cube? — Answer: If you carefully read the material presented, you should have understood that the type of liquid does not matter. If you take a 10 liter canister and pour solariums into it, then this will be a volume of 10 liters. We found out that a cube is equal to 1000 liters. Mean and solariums will be the same.

How many liters are in one barrel? — Answer: Also an interesting question. Many have heard the concept of a barrel, but what it is equal to to represent the quantity is not entirely clear. So, barrel translated from English means Barrel. Barrels vary in size. Similarly, with barrels - there are different sizes. One thing unites them - a measure of measurement of any bulk or liquid substance. We are probably more interested in the barrel that is mentioned with the concept of Oil.

How many decimeters are in one meter?

To measure the amount of oil, there is a special measure - Oil Barrel. It is equal to 158.988 ≈ 159 liters.

How many kg of water in a cube? — Answer: the amount of kilograms of water depends on the atmospheric pressure. Therefore, it is customary to measure such quantities at Normal atmospheric pressure of 101,325 Pa in accordance with international standards. For water, it is also necessary to take into account the fact of its maximum density, at which more molecules can fit in a volume of 1 cube. So, at a temperature of 3.98 ° C, the density of H2O is maximum. Under such conditions, 1000 kg of H2O would fit in a cubic meter.

How many liters in a gallon? — Answer: There are several quantities called Gallon. The most popular value is 1 US gallon, which is equal to ≈ 3.78 liters.

How many buckets of water in a cubic meter? — Answer: buckets are different. Find out the volume of your bucket, read this article and you will understand what you need to divide by what to find out the number of your buckets.

How much water for one maggi cube? — Answer: Is this a joke or you went off topic. Read the instructions for the maggi, it should be written there.

And what is the amount of gas in 1 m³? — Answer: all the same 1000 liters. It doesn’t matter what substance: air, propane, methane, gasoline, concrete, or something else…

And how to calculate in kg how many potatoes will be in 1 m³? — Answer: Take a 10 liter bucket, fill it with potatoes, put it on the scales and determine the number of kilograms. Multiply the result by 100. Get the number of kilograms of potatoes ≈ in 1 m³.

What is the displacement in 1 dal? - Answer: There is such a unit of measure Dal or Dekaliter, which is used mainly in winemaking. It is equal to 10 liters.

How much air is in 1 bar? — Answer: The question is not correct. 1 bar is a pressure measurement, not a quantity measurement.

How many m3 will be in 120 liters of water? - Answer: You need to divide the number of liters by 1000, you get the result in m³. In your case, 120 l = 0.12 m³. To all other users with a different amount of liquid, use this example.

In 2015 I will present you a couple of examples of problem solving on our topic and this will make it easier to understand the calculations and the conversion of quantities.

Now I will present you, as an addition, an interesting article about how many people can live without water and fantastic cases in the history of mankind that really took place.

Read about how long a person can do without water -tyts

It's no secret to anyone in what difficult economic conditions We all turned up. It's time to think about saving resources. And since the topic of our article is a measure of water measurement, it will be time to show you a way to really save 70 percent of the amount that you used to spend in times of economic prosperity without looking back. So let's watch the video.

Thank you all for your attention!

Alla Kyun good!

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How to calculate 1 running meter of linoleum

To find out how much square meters linoleum contained in one running meter(hereinafter p / m or p. m.), it is necessary to measure its width. Quantity sq. m., contained in one p / m of linoleum, is equal to its width.

The figures show samples of one p / m linoleum one meter long and 3, 2 and 1 meter wide.

1 p/m 1 p/m 1 p/m

So, the consumption of linoleum is 4 running meters. However, more linoleum may be required, depending on which pattern. And moreover, linoleum is deformed in rolls - it is difficult to measure it.

Linoleum is produced 4 m wide.

Calculate the consumption of linoleum, whose width is 4 m.

To calculate the consumption of linoleum, you need 12 sq.m. divide by 4 m. (12/4=3)

The previous two examples are simple - width floor covering matches the length of the floor or its width. Consider a more complex example where the width of the floor covering does not match the length or width of the floor.

Let's assume the room parameters remain the same.
Let the linoleum have a width of 1.6 m (for clarity).

How many meters are in a decimetre?

Then one p / m of this flooring is 1.6 sq.m.

calculation: 12 sq.m. /1.6 sq.m. = 7.5 p.m.

However, in order not to cover the floor in small pieces, it is necessary to take into account the width and length of the floor, so it is better to buy 8 p / m of coverage (possibly more, given the location of the pattern).

1.6 m

1.6 m

The consumption of linoleum is 2 sheets of 4 p / m. However, it is preferable to cover the floor with whole canvases.

This is exactly how the consumption of wallpaper, carpet and other carpet products is calculated.

In this lesson, students are given the opportunity to get acquainted with another unit of area, the square decimeter, learn how to convert square decimeters to square centimeters, and also practice various tasks for comparing quantities and solving problems on the topic of the lesson.

Read the topic of the lesson: "The unit of area is a square decimeter." In the lesson, we will get acquainted with another unit of area, a square decimeter, learn how to convert square decimeters to square centimeters and compare values.

Draw a rectangle with sides 5 cm and 3 cm and label its vertices with letters (Fig. 1).

Rice. 1. Illustration for the problem

Let's find the area of ​​the rectangle. To find the area, multiply the length by the width of the rectangle.

Let's write down the solution.

5*3=15(cm2)

Answer: the area of ​​a rectangle is 15 cm2.

We have calculated the area of ​​this rectangle in square centimeters, but sometimes, depending on the problem being solved, the units of the area may be different: more or less.

The area of ​​a square whose side is 1 dm is a unit of area, square decimeter(Fig. 2) .

Rice. 2. Square decimeter

The words "square decimeter" with numbers are written as follows:

5 dm 2, 17 dm 2

Let's establish the ratio between square decimeter and square centimeter.

Since a square with a side of 1 dm can be divided into 10 strips, each of which has 10 cm 2, then there are ten tens or one hundred square centimeters in a square decimeter (Fig. 3).

Rice. 3. One hundred square centimeters

Let's remember.

1 dm 2 \u003d 100 cm 2

Express these values ​​in square centimeters.

5 dm 2 \u003d ... cm 2

8 dm 2 = ... cm 2

3 dm 2 = ... cm 2

We reason like this. We know that there are one hundred square centimeters in one square decimeter, which means that there are five hundred square centimeters in five square decimeters.

Test yourself.

5 dm 2 \u003d 500 cm 2

8 dm 2 \u003d 800 cm 2

3 dm 2 \u003d 300 cm 2

Express these quantities in square decimetres.

400 cm 2 = ... dm 2

200 cm 2 = ... dm 2

600 cm 2 = ... dm 2

We explain the solution. One hundred square centimeters make up one square decimeter, which means that in the number 400 cm 2 there are four square decimeters.

Test yourself.

400 cm 2 = 4dm 2

200 cm 2 \u003d 2 dm 2

600 cm 2 \u003d 6 dm 2

Take action.

23 cm 2 + 14 cm 2 = ... cm 2

84 dm 2 - 30 dm 2 \u003d ... dm 2

8 dm 2 + 42 dm 2 = ... dm 2

36 cm 2 - 6 cm 2 \u003d ... cm 2

Consider the first expression.

23 cm 2 + 14 cm 2 = ... cm 2

We add up the numerical values: 23 + 14 = 37 and assign the name: cm 2. We continue to reason in the same way.

Test yourself.

23 cm 2 + 14 cm 2 \u003d 37 cm 2

84dm 2 - 30 dm 2 \u003d 54 dm 2

8dm 2 + 42 dm 2 = 50 dm 2

36 cm 2 - 6 cm 2 \u003d 30 cm 2

Read and solve the problem.

The height of a rectangular mirror is 10 dm, and the width is 5 dm. What is the area of ​​the mirror (Fig. 4)?

Rice. 4. Illustration for the problem

To find the area of ​​a rectangle, multiply the length by the width. Let's pay attention to the fact that both values ​​are expressed in decimeters, which means that the name of the area will be dm 2.

Let's write down the solution.

5 * 10 = 50 (dm 2)

Answer: the mirror area is 50 dm 2.

Compare sizes.

20 cm 2 ... 1 dm 2

6 cm 2 ... 6 dm 2

95 cm 2 ... 9 dm

It is important to remember that in order for values ​​to be compared, they must have the same name.

Let's look at the first line.

20 cm 2 ... 1 dm 2

Convert square decimeter to square centimeter. Remember that there are one hundred square centimeters in one square decimeter.

20 cm 2 ... 1 dm 2

20 cm 2 ... 100 cm 2

20 cm 2< 100 см 2

Let's look at the second line.

6 cm 2 ... 6 dm 2

We know that square decimeters are larger than square centimeters, and the numbers for these names are the same, which means we put the sign “<».

6 cm 2< 6 дм 2

Let's look at the third line.

95cm 2 ... 9 dm

Note that area units are written on the left, and linear units on the right. Such values ​​cannot be compared (Fig. 5).

Rice. 5. Various sizes

Today in the lesson we got acquainted with another unit of area, a square decimeter, learned how to convert square decimeters into square centimeters and compare values.

This concludes our lesson.

Bibliography

1. M.I. Moro, M.A. Bantova and others. Mathematics: Textbook. Grade 3: in 2 parts, part 1. - M .: "Enlightenment", 2012.
2. M.I. Moro, M.A. Bantova and others. Mathematics: Textbook. Grade 3: in 2 parts, part 2. - M .: "Enlightenment", 2012.
3. M.I. Moreau. Mathematics lessons: Guidelines for teachers. Grade 3 - M.: Education, 2012.
4. Regulatory document. Monitoring and evaluation of learning outcomes. - M.: "Enlightenment", 2011.
5. "School of Russia": Programs for elementary school. - M.: "Enlightenment", 2011.
6. S.I. Volkov. Mathematics: Testing work. Grade 3 - M.: Education, 2012.
7. V.N. Rudnitskaya. Tests. - M.: "Exam", 2012.

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2. Prosv.ru ().
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Homework

1. The length of the rectangle is 7 dm, the width is 3 dm. What is the area of ​​the rectangle?

2. Express these values ​​in square centimeters.

2 dm 2 \u003d ... cm 2

4 dm 2 \u003d ... cm 2

6 dm 2 = ... cm 2

8 dm 2 = ... cm 2

9 dm 2 = ... cm 2

3. Express these quantities in square decimeters.

100 cm 2 = ... dm 2

300 cm 2 = ... dm 2

500 cm 2 = ... dm 2

700 cm 2 = ... dm 2

900 cm 2 = ... dm 2

4. Compare the values.

30 cm 2 ... 1 dm 2

7 cm 2 ... 7 dm 2

81 cm 2 ... 81 dm

5. Make a task for your comrades on the topic of the lesson.

How to convert meters to decimeters?

How many decimeters are in one meter?

Therefore, to convert meters to decimeters, you need to multiply the number of meters by 10:

We will consider the conversion of meters to decimeters with specific examples.

Express meters in decimeters:

1) 4 meters;

2) 12 meters;

3) 30 meters;

4) 5.2 meters;

5) 25 meters 7 decimeters.

The following notation is used to shorten the notation:

1 meter = 1 m;

1 decimeter = 1 dm.

To convert meters to decimeters, multiply the number of meters by 10:

1) 4 m=4∙10 dm=40 dm;

2) 12 m=12∙10 dm=120 dm;

3) 30 m=30∙10 dm=300 dm;

4) 5.2 m=5.2∙10 dm=52 dm;

5) 25 m 7 dm = 25∙10 + 7 dm = 257 dm.

Svetlana MikhailovnaUnits of measurement

To find out how many decimeter meters should use a simple web calculator. In the left field, enter the number of counters you want to convert for conversion.

In the field on the right you will see the result of the calculation.

To convert counters or decimeters to other units, just click on the appropriate link.

What is "meter"

The meter (m, m) is one of the seven basic units of the international system (SI), which is also included in the ISS ISCA, ICSC, investor compensation schemes, ISC, ICSI, MCC and MTS. The counter is the distance traveled by light in vacuum for 1/299,792,458 seconds.

The definition, adopted in 1983 by the General Conference on Weights and Measures, means that the term "meter" is related to the second by a universal constant (the speed of light).

For a long time in Europe there were no standard measures for determining the length.

In the 17th century, there was an urgent need for unification. century. With the development of science, the search for a measure based on a natural phenomenon began to allow the decimal system to be calculated. Then the "Catholic meter" of the Italian scientist Tito Livio Burattini was adopted.

In 1960, from the control male and dropped to 1983. The gauge was at 1650763.73 wavelengths of the orange line (6056 nm) in the krypton range of the 86Kr isotope in vacuum.

Currently this prototype is not useful. Since the mid-1970s, when the speed of light has become as accurate as possible, it has been decided that the existing concept of the meter is related to the speed of light in a vacuum.

What is a "decimeter"?

Distance unit in the International System of Units (SI) One decimeter is equal to one tenth of a meter.

Russian brand - dm, international - dm. There are 10 centimeters and 100 millimeters in a decimeter.

How much is it in decimeters

Unit weight
1 t =	10 centers	1000 kg	1000 000 g	1000,000,000 mg
1 c =	100 kg	100 000 g	100,000,000 mg
1 kg =	1000g	1000 mg
1 g =	1000 mg

How many dm is 1 meter?

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How many decimeters in 1 meter (how many dm in 1 m)?

According to the international system of weights and measures in 1 meter 10 decimeters.

Online calculator for converting meters to decimeters.

Converting units of length, mass, time, information and their derivatives is a fairly simple task.

For these purposes, the engineers of our company have developed universal calculators for the mutual conversion of various units of measurement between themselves.

Universal unit calculators:

- length unit calculator
- mass unit calculator
- area unit calculator
- volume unit calculator
- time unit calculator

Theoretical and practical concepts of converting one unit of measurement to another are based on the centuries-old experience of mankind's scientific research in applied fields of knowledge.

Theory:

Mass is a characteristic of a body, which is a measure of the gravitational interaction with other bodies.

Length is the numerical value of the length of a line (not necessarily a straight line) from the start point to the end point.

Time is a measure of the flow of physical processes of a sequential change in their state, which in practice proceeds in one direction continuously.

Information is a form of information in any representation (regarding the calculation, mainly in digital form).

Practice:

This page provides the simplest answer to the question of how many decimeters are in 1 meter.

One meter is equal to 10 decimetres.