Correction :

6 : 1 = 6	1 + 0 = 1
6 - 2 = 4	17 - 15 = 2
18 : 6 = 3	22 - 18 = 4
5 + 4 = 9	46 - 23 = 23
8 + 16 = 24	21 - 9 = 12
34 - 10 = 24	7 × 6 = 42
11 - 7 = 4	22 - 3 = 19
40 - 16 = 24	9 × 11 = 99
14 + 15 = 29	40 - 18 = 22
31 - 21 = 10	31 - 13 = 18