Grade 3 · Math · Lesson 6

Use Number Lines

A number line is a straight line with numbers placed at equal intervals. It helps us visualize numbers, understand their order, and model addition and subtraction. Hopping forward (to the right) means adding; hopping backward (to the left) means subtracting.

What this lesson teaches

1Locate and label whole numbers on a number line up to 1,000
2Use a number line to model addition and subtraction by counting forward and backward
3Determine the missing value when hopping a given number of steps on a number line

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