Correction :

3 + 23 = 26	24 + 11 = 35
24 + 19 = 43	6 + 12 = 18
5 × 2 = 10	20 + 6 = 26
27 - 15 = 12	21 - 17 = 4
34 - 12 = 22	23 + 7 = 30
8 + 19 = 27	16 + 16 = 32
16 - 4 = 12	0 + 17 = 17
7 + 18 = 25	19 - 19 = 0
18 : 3 = 6	39 - 18 = 21
24 + 19 = 43	1 + 19 = 20