Correction :

18 + 4 = 22	17 + 9 = 26
36 - 17 = 19	28 : 7 = 4
18 + 11 = 29	8 + 9 = 17
21 + 5 = 26	9 + 19 = 28
10 - 0 = 10	13 + 10 = 23
2 : 2 = 1	1 + 10 = 11
45 : 9 = 5	6 + 23 = 29
9 - 9 = 0	18 + 17 = 35
21 + 20 = 41	22 - 2 = 20
5 × 2 = 10	12 + 16 = 28