Correction :

5 + 10 = 15	48 - 24 = 24
24 + 19 = 43	20 + 9 = 29
16 - 14 = 2	22 - 6 = 16
8 + 16 = 24	19 - 3 = 16
25 - 9 = 16	23 - 7 = 16
31 - 19 = 12	11 + 22 = 33
17 - 10 = 7	15 - 11 = 4
6 + 19 = 25	2 × 2 = 4
18 : 6 = 3	26 - 18 = 8
39 - 23 = 16	2 × 1 = 2