Correction :

8 + 8 = 16	35 - 20 = 15
12 + 6 = 18	26 - 15 = 11
20 + 24 = 44	11 + 18 = 29
13 + 23 = 36	7 - 4 = 3
22 - 9 = 13	31 - 18 = 13
8 + 10 = 18	24 + 4 = 28
6 + 1 = 7	24 + 14 = 38
15 + 4 = 19	12 + 19 = 31
19 - 19 = 0	11 × 10 = 110
15 + 15 = 30	3 + 15 = 18