the calculator sais 220-165=55 BUT
1 10 10 10-5=5
2 2 0 10-6=4
–1 6 5
0 4 5
that is the true answer
Huh??
220
- 165
-------
55 [you "borrowed" incorrectly......we're subtracting "5" from "11" ......not from "10" ]
