Grade 5

What is a ratio?

ratio

A way of comparing two amounts, like 2 red beads to 3 blue beads.

For example

Mix one part syrup with four parts water: a ratio of 1 to 4.

In Grade 5

Children build ratios with real objects, keeping the groups in step as the amounts grow.

Watch out for

Children often treat a ratio as a fraction of the whole. Two to three means five parts altogether, not two out of three.

Say it at home

When mixing a drink, talk about how many parts of each one go in.

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