Mental Math: Subtraction
Easy Ways to Subtract Numbers in Your Head
Published in
3 min readAug 3, 2021
My last article talked about easy ways to add numbers in your head. One of the ways covered in that article can be used to subtract as well. There are four methods I’ll cover here: subtracting by parts, subtracting an easy number and making an adjustment, subtracting from round numbers, and subtracting twice. Let’s look at those.
