Correction :

29 - 10 = 19	14 + 24 = 38
31 - 16 = 15	12 + 22 = 34
10 - 7 = 3	16 - 13 = 3
1 + 18 = 19	38 - 24 = 14
40 - 22 = 18	11 : 1 = 11
5 : 5 = 1	29 - 22 = 7
15 + 11 = 26	19 + 9 = 28
6 + 5 = 11	9 + 13 = 22
20 + 11 = 31	22 - 4 = 18
38 - 24 = 14	16 + 5 = 21