Correction :

9 : 9 = 1	24 - 13 = 11
4 × 1 = 4	10 + 24 = 34
4 : 2 = 2	7 : 1 = 7
32 - 13 = 19	24 + 18 = 42
26 - 8 = 18	21 + 11 = 32
3 - 1 = 2	23 + 14 = 37
38 - 17 = 21	2 + 7 = 9
26 - 23 = 3	30 - 12 = 18
21 - 20 = 1	3 + 19 = 22
20 - 12 = 8	12 + 20 = 32