Correction :

3 × 6 = 18	25 - 12 = 13
18 - 13 = 5	3 - 0 = 3
24 : 6 = 4	0 + 14 = 14
22 + 5 = 27	55 : 5 = 11
6 - 0 = 6	43 - 24 = 19
14 + 10 = 24	17 + 20 = 37
24 - 19 = 5	11 - 9 = 2
25 - 4 = 21	30 - 22 = 8
13 + 18 = 31	13 - 13 = 0
30 - 13 = 17	10 + 1 = 11