4 x 5

5 x 5

6 x 5

55 x 55

8

10

12

14

0

8

18

80

2 x 3

3 x 4

1 x 3

1 x 4

3 + 8

8 - 3

3 x 8

888

15

25

35

45

9

19

90

91

2 x 5

4 x 4

2 x 9

10 x 2

1 x 10

10 x 1

0 x 7

1 x 7