Subtraction
Subtract the following.
2 3 3 4 4 4
– 1 – 1 – 2 – 1 – 2 – 3
1
5 5 5 5 6 6
– 1 – 2 – 3 – 4 – 1 – 2
6 6 6 7 7 7
– 3 – 4 – 5 – 1 – 2 – 3
7 7 8 8 8 8
– 4 – 5 – 1 – 2 – 3 – 4
8 8 8 9 9 9
– 5 – 6 – 7 – 1 – 2 – 3
9 9 9 9 9 9
– 4 – 5 – 6 – 7 – 8 – 9
93