Correction :

18 + 14 = 32	5 × 5 = 25
15 - 2 = 13	37 - 22 = 15
11 + 23 = 34	17 - 9 = 8
3 + 1 = 4	26 - 5 = 21
7 + 0 = 7	21 + 20 = 41
20 + 13 = 33	7 × 5 = 35
33 - 10 = 23	38 - 19 = 19
25 - 17 = 8	2 × 10 = 20
34 - 18 = 16	7 + 4 = 11
30 - 13 = 17	9 + 0 = 9