Correction :

41 - 17 = 24	18 - 8 = 10
13 + 10 = 23	4 + 17 = 21
18 + 15 = 33	16 : 4 = 4
1 + 17 = 18	21 + 2 = 23
21 : 3 = 7	24 - 7 = 17
36 - 24 = 12	18 - 7 = 11
4 + 13 = 17	25 : 5 = 5
16 : 8 = 2	19 + 5 = 24
15 + 22 = 37	36 - 23 = 13
5 × 4 = 20	24 + 17 = 41