Correction :

17 - 16 = 1	32 - 15 = 17
14 + 23 = 37	6 + 13 = 19
4 - 4 = 0	0 + 6 = 6
2 × 4 = 8	12 + 5 = 17
32 - 15 = 17	0 + 3 = 3
29 - 10 = 19	24 - 13 = 11
24 + 22 = 46	19 + 21 = 40
28 - 14 = 14	30 - 11 = 19
20 - 4 = 16	12 + 11 = 23
20 - 0 = 20	55 : 5 = 11