Correction :

0 + 5 = 5	10 + 11 = 21
16 + 4 = 20	20 - 6 = 14
28 - 13 = 15	29 - 11 = 18
17 + 16 = 33	30 - 23 = 7
32 - 23 = 9	33 - 23 = 10
25 - 2 = 23	10 - 1 = 9
4 - 1 = 3	14 - 3 = 11
5 - 3 = 2	4 + 1 = 5
37 - 24 = 13	11 × 10 = 110
16 + 14 = 30	6 × 4 = 24