Correction :

66 : 11 = 6	30 - 14 = 16
39 - 22 = 17	18 - 1 = 17
5 + 15 = 20	22 - 12 = 10
37 - 22 = 15	110 : 10 = 11
15 - 0 = 15	14 - 8 = 6
3 + 10 = 13	7 + 13 = 20
24 : 8 = 3	25 - 22 = 3
19 - 4 = 15	39 - 15 = 24
18 - 6 = 12	1 + 18 = 19
20 - 8 = 12	21 + 24 = 45