Correction :

1 + 15 = 16	34 - 16 = 18
9 + 19 = 28	10 × 5 = 50
7 + 22 = 29	72 : 8 = 9
8 + 10 = 18	10 + 2 = 12
12 + 5 = 17	23 - 14 = 9
38 - 14 = 24	14 + 4 = 18
9 × 2 = 18	14 - 10 = 4
3 + 9 = 12	21 - 6 = 15
5 + 15 = 20	12 + 2 = 14
31 - 23 = 8	0 + 5 = 5