Correction :

27 - 19 = 8	38 - 15 = 23
3 + 7 = 10	4 × 4 = 16
3 + 6 = 9	44 : 4 = 11
34 - 24 = 10	18 + 3 = 21
19 + 5 = 24	11 + 22 = 33
18 - 17 = 1	13 - 4 = 9
14 + 0 = 14	16 + 18 = 34
24 + 2 = 26	7 × 8 = 56
22 + 17 = 39	2 × 2 = 4
9 + 18 = 27	10 + 5 = 15