Correction :

36 : 4 = 9	15 : 5 = 3
13 - 10 = 3	27 - 3 = 24
26 - 16 = 10	11 - 7 = 4
5 : 1 = 5	24 - 3 = 21
40 - 22 = 18	23 - 5 = 18
12 + 6 = 18	6 × 10 = 60
2 + 5 = 7	42 - 18 = 24
4 + 19 = 23	25 - 7 = 18
17 + 6 = 23	24 - 13 = 11
14 - 12 = 2	20 - 3 = 17