What this lesson teaches
Decimal place value.
Math in Action
Decimal Number Line
Place decimals on a number line!
Duration25 min
Age GroupAges 9–11
DifficultyIntermediate
SubjectMath
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How the activity runs
The learning connection
Placing decimals on a spatial number line reveals their relative size — the most common source of decimal errors is students not knowing which of two decimals is larger. A physical line makes this visual, concrete, and immediately self-correcting.
Try it with your learner
1. Draw line 0 to 1. 2. Mark 0.5. 3. Mark 0.2. 4. Mark 0.9. 5. Order five decimal numbers.