Correction :

19 + 13 = 32	18 - 14 = 4
11 + 3 = 14	15 + 11 = 26
14 + 0 = 14	39 - 23 = 16
11 + 11 = 22	42 - 20 = 22
14 - 14 = 0	26 - 12 = 14
34 - 11 = 23	10 × 4 = 40
24 - 3 = 21	0 + 11 = 11
77 : 7 = 11	30 - 12 = 18
11 + 9 = 20	26 - 23 = 3
3 × 3 = 9	10 - 0 = 10