Correction :

22 + 7 = 29	29 - 13 = 16
3 × 5 = 15	14 + 5 = 19
8 + 12 = 20	31 - 11 = 20
26 - 4 = 22	26 - 12 = 14
34 - 14 = 20	24 - 8 = 16
22 + 15 = 37	24 - 0 = 24
19 - 5 = 14	4 + 13 = 17
88 : 11 = 8	19 + 3 = 22
20 - 5 = 15	10 + 4 = 14
17 - 10 = 7	21 - 15 = 6