Conversion of Units of Length -
To convert a lower unit into a higher unit [like decimetre (dm) to metre (m), centimetre (cm) to metre (m), etc.], we have to divide by 10 or 100 or 1000 etc. and to convert a higher unit into a lower unit [like kilometre (km) to metre (m), hectometre (hm) to metre (m), etc.], we have to multiply by 10 or 100 or 1000 etc. We also know that division by 10, 100,1000, etc. is done by shifting the decimal point to the left of the given number and multiplication by 10, 100, 1000, etc. is done by shifting the decimal point to the right of the given number.
There are some way of unit conversions are given below in different category -
1) Expressing from Higher Unit to Lower Unit
2) Expressing from Lower Unit to Higher Unit