Trouve les nombres manquants :

25 - 3 = .....15 - 2 = .....
..... × 9 = 72..... + 20 = 33
8 : 1 = .....29 - 18 = .....
30 - ..... = 1020 + ..... = 27
10 + ..... = 1311 - 6 = .....
10 + ..... = 1911 × ..... = 121
8 : ..... = 4..... : 1 = 8
9 × ..... = 1823 - ..... = 23
110 : 11 = .....110 : ..... = 11
4 + 21 = .....17 + ..... = 23