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Math Lessons: Subtraction
The Number System
0 1 2 3 4 5 6 7 8 9 10
0 = 10 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1
10 - 1 = 9
9 - 1 = 8
8 - 1 = 7
7 - 1 = 6
6 - 1 = 5
5 - 5 = 0
3 - 1 = 2
5 - 2 = 3
4 - 1 = 3
6 - 3 = 3
7 - 2 = 5
3 - 2 = 1
5 - 1 = 4
8 - 4 = 4
9 - 5 = 4
6 - 2 = 4
4 - 3 = 1
10 - 5 = 5
7 - 4 = 3
3 - 0 = 3
8 - 2 = 6
5 - 3 = 2
2 - 1 = 1
9 - 6 = 3
4 - 2 = 2
More to come!
