Metric Measurement is the third of five self-paced lessons in the “Measurement” section. This lesson features basic metric units for length, weight, and volume. It also introduces the prefixes of kilo-, centi-, and milli- and their relationship to multiples of 10. KET’s GED^{®} Geometry Professional Development Online Course is designed to help you review and build your skills and knowledge of geometry concepts and to help you to gain confidence in preparing your learners for a substantial portion of the GED^{®}Mathematics Test. Click on the graphic to begin Lesson 3.

Some questions on the GED^{®} Mathematics Test require students to work with metric units of measurement. Although the metric system is used throughout the world, most GED students are not acquainted with it.

When they take the GED Mathematics Test, students may be confused when they see units that they do not know. The first step is to familiarize students with the basics of the metric system.

Introduce students to the basic metric units of measure and related benchmarks to help them visualize the metric units.

Present the key metric unit prefixes that they will need to know to work with metrics.

This lesson features basic metric units for length, weight, and volume. It also introduces the prefixes of kilo-, centi-, and milli- and their relationship to multiples of 10.

You can use the basic metric units of measure to make larger and smaller units by multiplying and dividing by 10, 100, and 1,000. You can form the names for other units by adding prefixes to the beginning of the basic units.

Study the examples in the chart to see how prefixes are used.

Question James says that the book he is reading weighs about 1,000 grams. How could he express 1,000 grams in another metric form?

Step 1 How would he choose which metric prefix to use?

He would evaluate the meaning of milli-, centi-, and kilo- to choose the correct prefix.

Step 2 Choose the prefix kilo-, which means 1,000, since the book is almost 1,000 grams.

James could express the weight as either 1,000 grams or 1 kilogram because they mean the same thing.

Answer James could say that the book weighs about 1 kilogram.

4Sample GED Questions

Directions: There are two questions on this page. Each will appear in the blue rectangle below. Click on Question 1 to see the first question, and then select your answer. Click on Question 2 to see the second question, and select your answer. As you solve these problems, consider how you would work through them with your students.

How could you help students choose metric units and apply the metric prefixes correctly?

5Skill Review

Measurement: Lesson 3 - Metric Measurement

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Printable Resource

In this lesson you have learned about metric measurement. This review consists of key terms and concepts with which you will need to be familiar. Click the view button on the left to access a review sheet.

Below you will also see a Classroom Connection with suggestions for linking this geometry content with your instruction.

Assign directly to your students using the code or link above, without having them log in. Simply tell your students to go to
www.pbsstudents.org and enter the Assignment Code, or click on the Assignment URL to share the assignment as a link.