Correction :

30 - 6 = 24	5 + 22 = 27
45 - 24 = 21	5 : 5 = 1
10 - 10 = 0	7 + 19 = 26
14 + 0 = 14	13 - 9 = 4
18 : 9 = 2	32 - 23 = 9
32 - 13 = 19	6 + 22 = 28
18 - 1 = 17	16 - 12 = 4
23 - 1 = 22	26 - 6 = 20
2 × 9 = 18	5 × 8 = 40
13 + 11 = 24	28 : 4 = 7