Correction :

24 : 6 = 4	19 - 13 = 6
0 + 16 = 16	22 + 12 = 34
28 - 24 = 4	19 - 1 = 18
32 - 17 = 15	7 + 10 = 17
35 - 13 = 22	30 - 9 = 21
22 - 10 = 12	10 : 5 = 2
7 + 20 = 27	17 + 21 = 38
26 - 13 = 13	6 + 15 = 21
47 - 24 = 23	19 - 15 = 4
11 + 18 = 29	13 - 10 = 3