Customary Linear Measurement G5.4M.C4.PO3. I can choose the appropriate unit of measurement for any...

Customary Linear Measurement

G5.4M.C4.PO3. I can choose the appropriate unit of measurement for any problem.

Essential Questions:

What are the units for measuring length in the customary system? How do we know which unit to use?

There are 2 different systems of

measurement:

customary and metric

The customary system is

primarily used in the United

States

The metric system is used in most of the rest

of the world

Today I can choose the appropriate unit for measuring

length and distances within the customary system.

There are four units for measuring length in the customary system:

Inches Feet Yards Miles

Inches are the smallest unit in the customary system. One

inch is about the width of your thumb.

Inches are measured with

a ruler

Here are some objects that would be

appropriate to measure in inches:

length of a pencil height of a small flower

length of a paper clip

A foot is almost as long as a piece of notebook paper

There are 12 inches in one foot

Here are some objects that would be

appropriate to measure in feet:length of a

carheight of a person

height of your classroom door

length of a couch

height of a tall tree

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When you hold your arms out at both sides and measure from fingertip to fingertip, that is about the same as one yard.

There are 3 feet in one yard

There are 36 inches in one yard

Here are some objects that would be

appropriate to measure in yards:length of a

swimming pool that is used for

competitiondistance from your classroom to

the cafeteria

length of a football field

height of a 10 story building

A mile is the largest unit for length in the

customary system. Miles are used for very long

distances.There are

1,760 yards in a mile

There are 5,280 feet in a mile

Here are some distances that would be

appropriate to measure in miles:

distance from your house to the mall

distance from Tucson, AZ to Disneyland

distance from Desert Willow to the U of A

Inches Feet Yards Miles

In Fourth Grade You Measure!

Your Turn!

What is the appropriate unit to use to measure each object or distance?

Closure:

On your slate, write one example of an object/distance

you can measure with each customary unit of length. Be

prepared to share!