Correction :

6 + 24 = 30	7 + 3 = 10
26 - 3 = 23	24 - 12 = 12
7 × 9 = 63	32 - 12 = 20
11 + 9 = 20	21 + 18 = 39
0 + 2 = 2	22 + 23 = 45
13 - 12 = 1	36 - 14 = 22
9 + 8 = 17	16 - 0 = 16
10 - 3 = 7	24 + 19 = 43
99 : 11 = 9	30 - 17 = 13
2 + 11 = 13	14 : 2 = 7