Here are the corrected answers:
5+8 = 137+4 = 113+8 = 1117-8 = 915-9 = 613-6 = 790-4 = 8627+3 = 3045-5 = 40
Here are the corrected answers:
5+8 = 13
7+4 = 11
3+8 = 11
17-8 = 9
15-9 = 6
13-6 = 7
90-4 = 86
27+3 = 30
45-5 = 40