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Transcript
Single-Digit Subtraction
1 2 3 4
5 6 7 8
9 10 11 12
13 14 15 16
17 18 19 20
3- 2
9- 3
7- 3
2- 2
8- 0
5- 5
6- 2
2- 1
5- 4
5- 3
7- 4
3- 1
1- 0
6- 3
9- 7
9- 6
9- 9
7- 6
4- 3
4- 2
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