Correction :

60 : 6 = 10	0 + 4 = 4
3 + 4 = 7	14 : 2 = 7
18 + 1 = 19	18 + 9 = 27
121 : 11 = 11	22 - 21 = 1
17 + 6 = 23	3 + 6 = 9
20 : 4 = 5	9 + 18 = 27
20 - 5 = 15	9 × 7 = 63
18 + 15 = 33	7 + 12 = 19
2 + 2 = 4	4 + 14 = 18
7 × 9 = 63	4 - 0 = 4