4*5=20
3*5=15
8*5=40
7*5=35
____________________________________________________________
6:3=2
27:3=9
15:3=5
9:3=3
____________________________________________________________
24:4=6
32:4=8
36:4=9
28:4=7
____________________________________________________________
5*2=10
7*2=14
9*2=18
6*2=12