Understanding Millimeter and Centimeter | 3rd Grade Maths Measurements

Understanding Millimeter and Centimeter | 3rd Grade Maths Measurements

Measurements: Millimeter and Centimeter

Chapter: 3rd Maths : Term 1 Unit 4 : Measurements

Millimeter and Centimeter

Introduction

This is a centimeter scale/ruler. 1 denotes 1 centimeter, 2 denotes 2 centimeter and so on. The length between 0 and 1 has 10 parts denoted by small lines. Measurement of each part is millimeter.

Can you tell me how many millimeters are there between 0 and 1 ?

Now, can you tell me how many millimeters are there between 1 and 2 ? 1 and 3 ?

Now, can you tell me how many millimeters are there in 1 centimeter ?

A ruler showing centimeters and millimeters

From the picture,

1 centimeter equal to 10 parts.

So 10 millimeter = 1 centimeter.

HOW TO WRITE

Millimete − mm

Centimeter − cm

Meter – m

Kilometer – km

Millimeter is the smaller unit of length.

Kilometer is the bigger unit of length.

Let us know

100 centimeter = 1 meter

1000 meter = 1 Kilometer

Example
Example of measuring objects

millimeter (mm), centimeter (cm), meter (m)

Activity 4

Measure the length of ribbon by tape roll.

Activity measuring ribbons

Raj ___ centimeter

Anu ___ centimeter

Ram ___ centimeter

Kavi ___ centimeter

The length of the ribbons same when we measure with standard tool using standard unit of measurement.

Practice

Measure the length of following things by centimeter scale and Fill in the given boxes with the measurements.

Practice exercise: measure the objects shown