Multi-Part Lesson
Name
PART
A
10-5
B
Choose the Appropriate Tool and Measure
Get Ready
Main Idea
I will choose the
appropriate tool and
measure length.
Look at the object. Then decide which unit you will
need to measure it.
Does it make sense to measure a piece of paper
with a centimeter ruler, inch ruler, a yardstick, or
a meter stick?
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The inch ruler and
centimeter ruler work best.
Since inches are longer than
centimeters, it makes more
sense to use an inch ruler.
I will choose the inch ruler
to measure this paper.
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1–7. Answers will vary depending on whether
centimeters or inches were chosen.
Check
Find the object and estimate its length. Choose the
tool and measure it.
Object
1.
Estimate
Tool
Measure
about
2.
about
3.
about
4.
about
5.
about
about
7.
about
How do you know which tool to use Sample answer: I will
to measure? use a yardstick to measure a longer object
8.
Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
6.
and a ruler to measure a shorter object.
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Name
Practice
9–13. Answers will vary depending on if
centimeters or inches were chosen.
Find the object and estimate its length. Choose the
tool and measure it.
Object
Estimate
Tool
Measure
9.
about
10.
about
11.
Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
about
12.
about
13.
about
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Solve.
14. Vijay measured the length of his bike with a
yardstick. He says it is one yardstick long.
How many inches long is it?
36
inches
15. Aisha had her mom mark her height on the wall.
They measured the length in centimeters. Is
there a better tool they could have used to
measure her height? What tool could they
have used?
Sample answer: Yes, they could have used feet;
a yardstick.
16. Ethan measured his foot with a meter stick. Curtis
measured his foot with a yardstick. What other
two tools would have been a better choice?
Sample answer: an inch ruler and a centimeter ruler
Sample answer: Omar estimated in yards but got an inch
ruler to measure with. He did not choose the right tool to
Copyright © Macmillan/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
17. Make It Right Omar went outside to measure
the driveway. He estimated the driveway to be
6 yards long. He went inside and got an inch
ruler to measure the driveway. Tell why Omar
is wrong. Make it right.
measure the driveway. He should use a yardstick.
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Math at Home Activity: Have your child walk around the house and
estimate the lengths of items- such as the hallway. Then ask your child
what tool he or she would use to measure it.
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