Week 15TuesdayMeasuring in Centimeters
1Warm-up: Inches Review

2-min Warm-up — Measure each line in inches.

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inches

Line A
inches
Line B
inches
2Meet the Centimeter

Centimeters are another unit for measuring length. A centimeter is smaller than an inch — about the width of your pinky finger!

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centimeters

This ruler shows 15 centimeters (cm). Each numbered mark is 1 cm.

3Estimate First, Then Measure

Estimate First! Guess in cm, then measure with the ruler.

Line A

My estimate: cm    Measured: cm

Line B

My estimate: cm    Measured: cm

Line C

My estimate: cm    Measured: cm


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centimeters
4Measure in Centimeters

Use the centimeter ruler to measure each line.

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centimeters


1. cm
2. cm
3. cm
4. cm
5Word Problem

Read carefully. Think about what is happening.

Mia's eraser is 5 cm long. Her glue stick is 9 cm long. If she lays them end to end in a straight line, how long is the line?

Draw or write your thinking:

cm