If 1 decimeter = 0.1 meter how do if figure 1 dm = ? millimeterAlso would I use this same formula example 20 dm = ? cm

1 decimetr = 0.1 meter.To find 1dm in
millimeter.

Solution:

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