Trouve les nombres manquants :

6 + 20 = .......... - 9 = 16
5 × 5 = .......... + 22 = 25
8 - 4 = .....11 + ..... = 22
26 - 7 = .......... + 16 = 35
33 - ..... = 13..... - 9 = 2
1 + ..... = 5..... - 4 = 10
23 + 12 = .....11 + ..... = 34
36 : ..... = 9..... + 0 = 21
7 + 11 = .....8 + 19 = .....
31 - 14 = .....12 + 0 = .....