Page 52 - fun with math

8 7 3 5

× 9 × 10 × 9 × 7

8 9 6 10

× 5 × 4 × 6 × 3

2

7 2 2 3

× 7 × 8 × 2 × 9

4 5 6 8

× 1 × 10 × 1 × 10

10 9 3 5

× 10 × 9 × 3 × 5

52