Trouve les nombres manquants :

..... + 24 = 30..... - 3 = 20
28 - 11 = .....29 - ..... = 14
3 × 9 = .....11 + 1 = .....
6 + 11 = .....42 - ..... = 23
4 + 12 = .......... + 9 = 9
25 - ..... = 24..... - 19 = 17
17 - 13 = .....24 - ..... = 8
9 × 3 = .....22 - ..... = 18
24 - 19 = .......... + 12 = 32
..... + 14 = 214 × 10 = .....