Question

Write a few sentences about different ways to show subtraction for a problem like 32 - 15

Answer 1

Using a number line 

and quessing

and calculater 

these can all help 
the answer is 17

Answer 2

The answer is 17.

You can use a number line, or add 15 to the answer to see if you get the other number to check if it is right also. Or use a number line, calculator, or use stuff like 32 pennies and subtract 15 pennies then you get your answer.