Correction :

45 - 23 = 22	4 × 9 = 36
32 - 24 = 8	0 + 3 = 3
14 - 9 = 5	11 + 23 = 34
15 - 15 = 0	10 + 22 = 32
33 - 14 = 19	4 : 1 = 4
15 + 17 = 32	4 + 15 = 19
10 - 2 = 8	19 + 23 = 42
13 - 5 = 8	14 - 7 = 7
13 + 6 = 19	23 - 16 = 7
1 + 16 = 17	1 - 1 = 0