Correction :

0 + 22 = 22	15 - 8 = 7
24 - 7 = 17	24 + 23 = 47
34 - 15 = 19	29 - 23 = 6
39 - 23 = 16	8 + 8 = 16
8 - 4 = 4	21 + 2 = 23
41 - 19 = 22	0 + 10 = 10
0 + 0 = 0	32 - 22 = 10
3 : 3 = 1	17 - 9 = 8
15 - 10 = 5	2 + 10 = 12
5 + 15 = 20	22 - 22 = 0