Warm Up

1
Warm Up
Problem of the Day
Lesson Presentation
2
Warm Up Multiply 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
0.4871
3
Problem of the Day James said he was 5 ft 6 in.
tall. His brothers height is 65 in. Who is the
tallest and by how much?
James, by 1 in.
4
Learn to understand and select appropriate metric
units of measure.
5
Insert Lesson Title Here
Vocabulary
metric system
6
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 Length Metric Units of Length Metric Units of Length Metric Units of Length
Unit Abbreviation Relation to a Meter Benchmark
Millimeter mm 0.001 m Thickness of a dime
Centimeter cm 0.01 m Width of a fingernail
Decimeter dm 0.1 m Width of CD case
Meter m 1 m Width of a single bed
Kilometer km 1,000 m Distance around a city block
7
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.
A ballpoint pen is about 14 cm long.
B. A football field is about 100 _____ long.
Think A football field is about 100 times the
width of a single bed.
A football field is about 100 m long.
8
Check It Out Example 1 What 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.
A loaf of bread is about 3 dm long.
Think A. earthworm is about 5 times the width of
a fingernail.
An earthworm is about 5 cm long.
9
Metric Units of Mass Metric Units of Mass Metric Units of Mass Metric Units of Mass
Unit Abbreviation Relation to a Gram Benchmark
Milligram mg 0.001g Very small insect
gram g 1 g Large paper clip
Kilogram kg 1,000 g Textbook
10
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.
An orange has a mass of about 600 g.
11
Check It Out Example 2 What 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.
The Liberty Bell has a mass of about 943 kg.
12
Metric Units of Capacity Metric Units of Capacity Metric Units of Capacity Metric Units of Capacity
Unit Abbreviation Relation to a Liter Benchmark
Milliliter mL 0.001 L Drop of water
Liter L 1 L Blender container
13
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.
An ice cream scoop holds about 100 mL.
14
Check It Out Example 3 What 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.
A large punch bowl holds about 7 L.
15
Additional Example 4 Estimating Measurement
Measure the length of the
line to the nearest meter.
3 4
The line is between 3 and 4 meters. Closer to 4 m
than 3 m.
The length of the line is about 4 m.
16
Check It Out Example 4 Measure the length
of the line to the nearest meter.
The line is between 1 and 2 meters. Closer to 1 m
than 2 m.
The length of the line is about 1 m.
17
Insert Lesson Title Here
Lesson Quiz
Name 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 _____.
cm
g
L
kg