subtract place value

This week for maths I learnt how to subtract by using place value.

To subtract in place value first I wrote the question to solve. Then I took the second number and I spilt it. 164 - 46
46 = 40 + 6

I took the ones and take away from the big number.
164 - 6 = 140

Next I took away the ten. There is no hundreds in 46.
140 - 40 = 100

I found this faster because is was faster than using you hands.