Correction :

17 - 1 = 16	30 - 14 = 16
1 × 1 = 1	11 - 6 = 5
29 - 9 = 20	12 + 12 = 24
24 - 7 = 17	24 + 22 = 46
35 - 14 = 21	6 + 0 = 6
12 - 5 = 7	55 : 5 = 11
6 + 17 = 23	37 - 23 = 14
19 + 10 = 29	33 - 12 = 21
2 × 11 = 22	3 × 7 = 21
9 - 9 = 0	11 + 9 = 20