Correction :

25 - 22 = 3	4 - 0 = 4
21 + 13 = 34	14 - 10 = 4
7 + 1 = 8	24 + 3 = 27
10 - 9 = 1	3 + 17 = 20
16 + 20 = 36	27 - 6 = 21
9 × 2 = 18	30 - 19 = 11
36 : 4 = 9	5 + 14 = 19
15 + 24 = 39	21 + 16 = 37
11 + 0 = 11	9 × 4 = 36
33 - 22 = 11	20 - 10 = 10