Correction :

8 × 4 = 32	16 + 18 = 34
43 - 22 = 21	11 + 21 = 32
36 - 20 = 16	4 : 2 = 2
6 : 6 = 1	13 + 18 = 31
30 - 18 = 12	22 + 0 = 22
23 - 7 = 16	13 - 5 = 8
30 - 16 = 14	18 + 21 = 39
12 - 2 = 10	22 - 15 = 7
21 + 4 = 25	3 + 16 = 19
42 - 21 = 21	9 + 0 = 9