Correction :

23 - 6 = 17	88 : 11 = 8
13 + 11 = 24	10 + 22 = 32
25 - 3 = 22	21 + 10 = 31
40 - 19 = 21	20 - 5 = 15
5 + 11 = 16	11 - 7 = 4
24 - 13 = 11	22 + 24 = 46
13 + 3 = 16	7 + 12 = 19
8 + 24 = 32	13 + 19 = 32
24 + 7 = 31	32 - 22 = 10
12 - 3 = 9	28 - 15 = 13