Correction :

9 + 10 = 19	23 + 15 = 38
24 - 5 = 19	8 - 5 = 3
14 : 2 = 7	4 × 10 = 40
5 + 1 = 6	20 : 2 = 10
14 + 5 = 19	10 + 2 = 12
11 + 7 = 18	6 : 3 = 2
13 - 2 = 11	8 × 8 = 64
19 - 4 = 15	10 × 1 = 10
32 : 4 = 8	33 - 21 = 12
0 + 21 = 21	28 - 14 = 14