Correction :

40 : 10 = 4	12 + 14 = 26
28 - 7 = 21	24 + 11 = 35
16 - 15 = 1	8 + 18 = 26
23 + 16 = 39	41 - 22 = 19
8 + 12 = 20	41 - 21 = 20
16 - 16 = 0	1 × 1 = 1
13 + 13 = 26	44 : 4 = 11
0 + 19 = 19	23 + 10 = 33
20 - 13 = 7	28 - 16 = 12
27 - 14 = 13	25 - 24 = 1