Correction :

7 + 16 = 23	26 - 12 = 14
20 - 12 = 8	11 - 1 = 10
10 + 16 = 26	6 : 3 = 2
34 - 18 = 16	8 - 7 = 1
5 × 8 = 40	41 - 17 = 24
36 : 6 = 6	24 + 1 = 25
29 - 20 = 9	2 + 5 = 7
17 + 23 = 40	2 × 10 = 20
11 + 2 = 13	19 + 23 = 42
35 - 20 = 15	15 + 23 = 38