Correction :

17 + 6 = 23	15 : 5 = 3
15 + 8 = 23	12 + 2 = 14
5 × 5 = 25	9 - 8 = 1
22 + 8 = 30	34 - 13 = 21
12 + 7 = 19	5 + 9 = 14
23 - 15 = 8	2 + 17 = 19
16 + 2 = 18	4 + 21 = 25
16 + 9 = 25	6 + 2 = 8
9 + 18 = 27	22 - 0 = 22
24 - 20 = 4	6 + 11 = 17