Correction :

1 + 22 = 23	56 : 8 = 7
38 - 14 = 24	16 + 11 = 27
9 - 1 = 8	22 - 11 = 11
15 + 15 = 30	12 + 11 = 23
34 - 22 = 12	11 - 4 = 7
12 + 4 = 16	9 - 2 = 7
21 + 1 = 22	12 - 10 = 2
24 - 14 = 10	1 × 8 = 8
6 × 1 = 6	18 + 4 = 22
9 - 1 = 8	4 - 0 = 4