May 9
3 min read
5 Ways to Subtract Without Borrowing
It’s difficult to subtract using borrowing in your head. Here’s what I do instead.
I suck at doing introductions almost as much as I do borrowing, so instead I’m just going to get into the meat of the matter.
- Subtracting from large round numbers
To subtract from large round numbers, tale 1 away, this leaves you just with 9s. Do the subtraction, and…
