What is residue?

Residue is what’s left over after you do something with numbers or things.

Imagine you have 10 cookies, and you want to share them equally among 3 friends. You give each friend 3 cookies, that's 9 total. But there's still 1 cookie left. That one extra cookie is the residue, it’s what remains after you’ve shared as much as you could.

Think of residue like the leftover piece of pizza when everyone takes equal slices, but there's not enough for another full slice. If you have 7 slices and 3 people, each gets 2 slices, that’s 6 total, and there’s 1 slice left over, which is your residue.

Residue happens whenever something doesn’t divide evenly, whether it’s cookies, pizza, or even numbers in math problems. It's just the part that stays behind after everything else has been shared or used up!