Correction :

10 × 3 = 30	20 - 16 = 4
26 - 2 = 24	44 - 21 = 23
31 - 21 = 10	20 - 13 = 7
24 - 12 = 12	5 × 6 = 30
22 + 22 = 44	11 × 6 = 66
22 - 10 = 12	38 - 14 = 24
36 - 22 = 14	39 - 20 = 19
54 : 6 = 9	12 + 19 = 31
27 - 23 = 4	44 : 4 = 11
41 - 22 = 19	0 + 15 = 15