Correction :

5 + 3 = 8	17 - 2 = 15
5 × 9 = 45	18 + 12 = 30
20 + 14 = 34	21 + 6 = 27
18 - 18 = 0	33 : 3 = 11
11 - 3 = 8	27 - 16 = 11
24 : 6 = 4	9 × 7 = 63
1 + 9 = 10	15 + 20 = 35
11 - 0 = 11	13 + 1 = 14
22 + 5 = 27	10 + 23 = 33
39 - 23 = 16	19 + 19 = 38