Correction :

18 + 23 = 41	19 + 19 = 38
16 - 16 = 0	16 + 8 = 24
26 - 19 = 7	33 - 22 = 11
13 + 16 = 29	34 - 17 = 17
33 - 9 = 24	16 + 19 = 35
25 - 5 = 20	24 - 20 = 4
10 - 2 = 8	4 + 14 = 18
19 - 9 = 10	8 + 23 = 31
9 × 5 = 45	18 + 16 = 34
70 : 7 = 10	45 : 9 = 5