Because the metric system is completely decimalized, it is not too hard to convert from one measure to another. All you have to do is to move the decimal point the correct number of places in the correct direction.
There are, as you say, 10 decimeters in a meter. There are 1000 millimeters in a meter. So that means you have to move the decimal two places to get from decimeters to millimeters.
Therefore 1 decimeter = 100 millimeters (moved the decimal point two places to the right because a decimeter is bigger than a millimeter.
A centimeter is in between a decimeter and a millimeter -- you only move the decimal one place.
Therefore 20 dm = 200 cm.
1 decimetr = 0.1 meter.To find 1dm in millimeter.
First the abbreviation dm stands for decimeter.
In Metric system 1 meter= 10 decimeter. Dividing by 10 and swapping left and right we get: 1 decimeter = (1/10) meter.
1 meter = 10 decimeter = 100 cetimeter = 1000 millimeter.
10 decimeter = 100 centimeter. Dividing by 10, we get:
10decimeter = 100centimeter. Dividing by 10 we get:
1 decimeter = 10 centimeter.
Therefore 10 decimeter = 1000 millimeter. Dividing by 10 we get:
1 decimeter = 1000/10 millimere.
1 decimeter = 100 millimeter.
Therefore for conversion from decimeter(dm) to centimeter (cm) we use 1 dm = 10 ccm.
To find 20 decimeter (dm) in centimeter (cm):
20 dm = 20 *(1dm) = 20*(10cm) =200cm
The conversion factors for different measures of lengths in the metric system are as follows.
1 meter = 10 decimeter (dm)
1 meter = 100 centimeter (cm)
1 meter = 1000 millimeter (mm)
From these basic conversion between meter and other units we can work out the conversions between any to units.
1 meter = 10 dm = 100 cm
1 dm = 100/10 = 10 dm
10 dm = 1000 mm
1 dm = 100 mm
Using these conversion factors:
20 dm = 20*10 cm = 200 cm