Correction :

3 × 2 = 6	35 - 15 = 20
28 - 16 = 12	121 : 11 = 11
24 + 6 = 30	14 : 7 = 2
27 - 7 = 20	9 - 9 = 0
13 - 8 = 5	10 + 14 = 24
2 + 10 = 12	5 + 16 = 21
27 - 17 = 10	10 + 13 = 23
20 - 19 = 1	20 - 16 = 4
12 + 4 = 16	41 - 21 = 20
36 : 9 = 4	35 - 20 = 15