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How many decimeters is 4 meters?
4 meters equals 40 decimeters.

This is about the conversion of length units. First of all, we need to know which length units are there and what is the progress between them. 1 m equals 10 decimeter. 4 meters equals 40 decimeters. That is 4X 10=40. The unit of length is a common problem in life, so the learning content of primary school mathematics. Meters, decimeters, centimeters, millimeters. Conversion between units. 1 m = 10 decimeter. 1 decimeter = 10/0cm. 1 cm = 10 mm This must be mastered.

The following length units and unit conversions are for your reference: common length units are meter, decimeter, centimeter, millimeter, 1 meter equals 1 decimeter, 1 decimeter equals1centimeter,1millimeter.

Brief introduction of meter unit and conversion relationship

"m/m" (mètre) is the basic unit of length in the international system of units, with the symbol m, and one meter is equal to 10 decimeter. It can be used to measure length, width and height. The definition of "meter" originated in France. The length of 1 meter was originally defined as one ten thousandth of the distance from the equator of the earth to the north pole on the meridian passing through Paris, and then the international meter origin was determined.

Length unit conversion:

1, 1 km =1000m.

2. 1 m = 10 decimeter.

3. 1 decimeter = 10/0cm.

4. 1 cm = 10/0mm.

5. 1 m = 100 cm。

6. 1m = 1000mm。