9 x 5 = (a)  

11 x 5 (a)  

2 x 7 = (a)  

12 x 2 = (a)  

9 x 2 = (a)  

10 x 5 = (a)  

13 x 10 = (a)  

1 x 10 = (a)  

5 x (a)   = 40

2 x (a)   = 22

10 x (a)   = 110

(a)   x 3 = 15

(a)   x 6 = 12

(a)   x 10 = 0

(a)   = 4 x 10

8 = (a)   x 2

5 = 1 x (a)  

5 x 4 = 10 x (a)  

5 x 8 = 10 x (a)