The Incredible Hand Calculator

8 x 9 = 72

1 x 9

2 x 9

3 x 9

4 x 9

5 x 9

1 x 9 2 x 9 3 x 9 5 x 9 4 x 9 left hand10 x 99 x 96 x 97 x 9right hand, third digit from the right folded down

6 x 9

7 x 9

8 x 9

9 x 9

10 x 9

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