Correction :

45 : 5 = 9	2 × 7 = 14
70 : 7 = 10	5 + 0 = 5
27 - 20 = 7	10 - 6 = 4
7 + 23 = 30	10 × 5 = 50
32 - 18 = 14	15 + 9 = 24
23 + 19 = 42	9 + 6 = 15
19 + 1 = 20	5 × 2 = 10
15 + 11 = 26	14 + 23 = 37
29 - 17 = 12	11 + 3 = 14
23 - 15 = 8	49 : 7 = 7