Correction :

10 × 7 = 70	17 - 14 = 3
9 × 2 = 18	35 - 23 = 12
0 + 20 = 20	19 - 9 = 10
33 - 13 = 20	19 + 11 = 30
21 + 23 = 44	110 : 11 = 10
5 + 1 = 6	10 + 1 = 11
33 - 22 = 11	3 + 24 = 27
29 - 10 = 19	23 - 18 = 5
12 - 3 = 9	4 + 18 = 22
15 + 1 = 16	1 + 17 = 18