Ontario K–8 curriculum · Glossary

numerator

Definition

The numerator is the top number in a fraction, showing how many pieces of the whole you have. For example, if you have 3 out of 4 slices of pizza, 3 is the numerator.

In the fraction 3/4, the numerator is 3 because we are talking about 3 of the 4 equal parts.

How to teach this in 30 seconds

Try this analogy: The numerator is like counting how many slices of a shared pizza you have on your own plate.

Ask your child: If this fraction is 3/4, how many pieces are we talking about?

Common mix-up: Kids can mix up the top and bottom numbers. The numerator on top always tells you how many parts you are counting.

Examples

  • If you eat 2 slices of a pie cut into 8 pieces, the numerator is 2.
  • If 5 out of 8 crayons in a box are blue, the numerator is 5.

numerator is a term used in Ontario’s Kindergarten to Grade 8 curriculum.

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