2 + 2
What is 4
10- 1
What is 9
4+4 =
what is 8
10 - 2
What is 8
8+8=
What is 16
10 - 3
What is 7
16 + 16 =
What is 32
10 - 4
What is 6
32 + 32 =
What is 64
10 - 7
What is 3