Correction :

22 + 5 = 27	28 : 4 = 7
6 × 10 = 60	22 - 8 = 14
36 : 6 = 6	22 + 3 = 25
33 - 11 = 22	1 + 6 = 7
26 - 10 = 16	0 + 8 = 8
23 + 21 = 44	9 + 4 = 13
40 : 4 = 10	13 + 5 = 18
21 - 8 = 13	15 + 15 = 30
40 - 23 = 17	24 + 18 = 42
4 + 3 = 7	21 + 1 = 22