iReady Less 26 Sess 1

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SESSION 1
Explore
Solving Word Problems
Involving Conversions

Learning Target
Convert between measurement units to solve
multi-step problems.

LESSON 26 • Solve Word Problems Involving

Conversions

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Start

Same and Different

1 foot = 12 inches

A

foot = ? inches

B

24 inches = ? feet

C

feet = ? inches

D

6 inches = ? foot

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Make sense of the problem

Haru has a log that is 90 inches long.
She cuts the log into 2-foot pieces to
make planters.

• How would you say this

problem in your own words?

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Make sense of the problem

Haru has a log that is 90 inches long.
She cuts the log into 2-foot pieces to
make planters. How many 2-foot pieces
of wood can Haru cut from the log?
(1 foot = 12 inches)

• What information is

important based on
what you need to find?

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Solve and support your thinking

Haru has a log that is 90 inches long.
She cuts the log into 2-foot pieces to
make planters. How many 2-foot pieces
of wood can Haru cut from the log?
(1 foot = 12 inches)

Math Toolkit base-ten blocks, number lines,
grid paper, math reference sheet

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Share your thinking with a partner

Ask your partner:
Can you explain that again?

Tell your partner:
I started by . . .

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Compare class strategies

Haru has a log that is 90 inches long.
She cuts the log into 2-foot pieces to
make planters. How many 2-foot pieces
of wood can Haru cut from the log?
(1 foot = 12 inches)

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Make connections and explain your thinking

Explain how you found the number of 2-foot
pieces Haru can cut from the log.

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Make connections and explain your thinking

In the previous problem, you used more than
one step to find a solution to a problem
involving converting units of measure.
You can start this type of problem in different
ways. Consider this problem:

Look at the scale. How much more mass
needs to be added to the left side in order to
make the scale balance?
(1 kilogram = 1,000 grams)

a. What should you do first to find how much

more mass is needed to balance the scale?

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Make connections and explain your thinking

In the previous problem, you used more than
one step to find a solution to a problem
involving converting units of measure.
You can start this type of problem in different
ways. Consider this problem:

Look at the scale. How much more mass
needs to be added to the left side in order to
make the scale balance?
(1 kilogram = 1,000 grams)

b. Convert 2.5 kilograms to grams. What

operation did you use? Convert 800 grams
to kilograms. What operation did you use?
Show your work.

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Make connections and explain your thinking

In the previous problem, you used more than
one step to find a solution to a problem
involving converting units of measure.
You can start this type of problem in different
ways. Consider this problem:

Look at the scale. How much more mass
needs to be added to the left side in order to
make the scale balance?
(1 kilogram = 1,000 grams)

c. Choose one of the conversions from part b

to solve the problem.

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Close: Exit Ticket

When you convert from grams to kilograms,
do you end up with more units or fewer units?
When you convert from kilograms to grams,
do you end up with more units or fewer units?
Why?

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Real-World Connection

An arborist is a person who
plants, cares for, and
maintains trees. Arborists
specialize in the health
care of trees and are
sometimes called tree
doctors.

When might it be useful to
solve multi-step problems
involving conversions?

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Vocabulary

convert

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Practice

The statements 1 yard = 3 feet and 1 foot =
12 inches describe relationships among three
units of length. How can you convert 5 yards to
inches?

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Practice

Solve the problem. Show your work.

Santo has a string that is 80 inches long.
He cuts the string into 3-foot pieces to
make necklaces. He uses one 3-foot piece
of string for each necklace. How many
necklaces can Santo make using this
string? (1 foot = 12 inches)

Solution

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Practice

Check your answer. Show your work.

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