Correction :

0 + 21 = 21	2 × 6 = 12
24 - 10 = 14	1 × 11 = 11
22 - 4 = 18	1 + 10 = 11
45 - 22 = 23	10 × 6 = 60
35 - 21 = 14	43 - 22 = 21
4 + 12 = 16	23 - 2 = 21
10 + 21 = 31	7 + 22 = 29
35 - 17 = 18	15 + 18 = 33
21 + 4 = 25	0 + 6 = 6
19 + 22 = 41	19 - 12 = 7