Question

How do you do the problem of 100-37?

Answer 1

100-37=63 

Check your work 

63 + 37 = 100 

The answer is correct. 

Answer 2

100-37=63

it helps to write the problem like this

100
- 37

since there are no units you need to borrow from the tens, but there are no tens so you need to borrow from the hundreds

now the equation could be written in two pieces like this

90 10
- 30 - 7

90-30=60
10-7=3

60+3=63