九九乘法

Front

9 x 9

Back

81

Front

9 x 8

Back

72

Front

9 x 7

Back

63

Front

9 x 6

Back

54

Front

9 x 5

Back

45

Front

9 x 4

Back

36

Front

9 x 3

Back

27

Front

9 x 2

Back

18

Front

8 x 9

Back

72

Front

8 x 8

Back

64