Multiplication by 9

Front

9 x 0

Back

0

Front

9 x 2

Back

18

Front

9 x 1

Back

9

Front

9 x 5

Back

45

Front

9 x 3

Back

27

Front

9 x 4

Back

36

Front

9 x 8

Back

72

Front

9 x 6

Back

54

Front

9 x 7

Back

63

Front

9 x 10

Back

90