Which subtraction sentences show you how to find 15 - 7?

15-6-9,9-8=1
15 - 5 = 10, 10 - 5=5
15 - 5 = 10, 10 - 2=8
15 - 2 = 13, 13 - 2 = 11

15 - 8 = 7

The correct subtraction sentences that show you how to find 15 - 7 are:

1. Subtract 7 from 15: 15 - 7 = 8