Correction :

24 : 4 = 6	42 - 18 = 24
28 - 19 = 9	0 - 0 = 0
23 - 10 = 13	23 + 6 = 29
2 × 5 = 10	9 + 7 = 16
9 × 5 = 45	1 - 0 = 1
24 + 20 = 44	1 × 6 = 6
40 - 22 = 18	1 + 21 = 22
10 + 0 = 10	29 - 5 = 24
9 × 7 = 63	22 - 7 = 15
25 - 17 = 8	14 + 24 = 38