# Understanding remainders

Use arrays and practice problems to understand remainders.

## Some division problems work out nicely.

## Other division problems don't work out nicely.

Oh no! We can't split circles into perfect groups of . We have some circles left over.

## Key idea: We can use a *remainder* to describe what *remains* after dividing.

## Practice problems

## Challenge: Try this game

**Instructions:**Your goal is to figure out the remainder of the division problem shown on the screen. Once you know the answer, rotate the shape so that the edge with the answer is at the bottom.

**Pro tip:**The down arrow speeds things up.