9-2 Understanding Metric Units of Measure

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Warm UpWarm Up

Lesson PresentationLesson PresentationProblem of the DayProblem of the Day

Warm UpMultiply the following by 1,000.

1. 0.03 2. 4.02

Divide the following by 1,000.3. 30 4. 487.1

30 4,020

0.03

Course 1

9-2 Understanding Metric Units of Measure

0.4871

Problem of the DayJames said he was 5 ft 6 in. tall. His brother’s height is 65 in. Who is the tallest and by how much?James, by 1 in.

Course 1

9-2 Understanding Metric Units of Measure

Learn to understand and select appropriate metric units of measure.

Course 1

9-2 Understanding Metric Units of Measure

Vocabularymetric system

Insert Lesson Title Here

Course 1

9-2 Understanding Metric Units of Measure

The metric system of measurement is used almost everywhere in the world. Its advantage over the customary system is that all metric units are related by the decimal system.

Metric Units of LengthUnit Abbreviation Relation

to a MeterBenchmark

Millimeter mm 0.001 m Thickness of a dimeCentimete

rcm 0.01 m Width of a fingernail

Decimeter dm 0.1 m Width of CD caseMeter m 1 m Width of a single bed

Kilometer km 1,000 m Distance around a city block

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9-2 Understanding Metric Units of Measure

Additional Example 1: Choosing Appropriate Units of Length

What unit of measure provides the best estimate? Justify your answer.A. A ballpoint pen is about 14 _____ long.

Think: A ballpoint pen is about 14 times the width of a fingernail.

Think: A football field is about 100 times the width of a single bed.

Course 1

9-2 Understanding Metric Units of Measure

A ballpoint pen is about 14 cm long.

A football field is about 100 m long.

B. A football field is about 100 _____ long.

Check It Out: Example 1What unit of measure provides the best estimate? Justify your answer.A. A loaf of bread is about 3 _____ long.

B. An earthworm is about 5 _____ long.

Think: A loaf of bread is about 3 times the width of a CD case.

Think: A. earthworm is about 5 times the width of a fingernail.

Course 1

9-2 Understanding Metric Units of Measure

A loaf of bread is about 3 dm long.

An earthworm is about 5 cm long.

Metric Units of MassUnit Abbreviation Relation to a

GramBenchmark

Milligram mg 0.001g Very small insectgram g 1 g Large paper clip

Kilogram kg 1,000 g Textbook

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9-2 Understanding Metric Units of Measure

Additional Example 2: Choosing Appropriate Units of Mass

What unit of measure provides the best estimate? Justify your answer.An orange has a mass of about 600 _____ .Think: An orange has a mass of about 600 times the mass of a large paperclip.

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9-2 Understanding Metric Units of Measure

An orange has a mass of about 600 g.

Check It Out: Example 2What unit of measure provides the best estimate? Justify your answer.

The Liberty Bell has a mass of about 943 _____ .

Think: The Liberty Bell has a mass of about 943 times the mass of a textbook.

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9-2 Understanding Metric Units of Measure

The Liberty Bell has a mass of about 943 kg.

Metric Units of Capacity

Unit Abbreviation Relation to a Liter

Benchmark

Milliliter mL 0.001 L Drop of waterLiter L 1 L Blender container

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9-2 Understanding Metric Units of Measure

Additional Example 3: Choosing Appropriate Units of Capacity

What unit of measure provides the best estimate? Justify your answer.An ice cream scoop holds about 100 _____ .Think: An ice cream scoop holds the capacity of about 100 times a drop of water.

Course 1

9-2 Understanding Metric Units of Measure

An ice cream scoop holds about 100 mL.

Check It Out: Example 3What unit of measure provides the best estimate? Justify your answer.A large punch bowl holds about 7 _____ .Think: A large punch bowl holds the capacity of about 7 times the capacity of a blender container.

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9-2 Understanding Metric Units of Measure

A large punch bowl holds about 7 L.

Additional Example 4: Estimating Measurement

Measure the length of the line to the nearest meter.

The line is between 3 and 4 meters. Closer to 4 m than 3 m.

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9-2 Understanding Metric Units of Measure

The length of the line is about 4 m.

3 41 m 2

Check It Out: Example 4Measure the length of the line to the nearest meter.

The line is between 1 and 2 meters. Closer to 1 m than 2 m.

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9-2 Understanding Metric Units of Measure

The length of the line is about 1 m.

1 m 2 3 4

Lesson QuizName the most appropriate unit of measure.

1. A door knob has a diameter of about 7 _____.

2. A ballpoint pen weighs about 3 _____.

3. A gallon of milk is almost 4 _____.

4. Paul estimated the weight of his infant sister to t be 5 _____.

g

cm

Insert Lesson Title Here

L

kg

Course 1

9-2 Understanding Metric Units of Measure