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TRANSCRIPT
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Introducing Chapter 12
Lesson 1: Nonstandard Units
Lesson 2: Measure Inches Using Models
Lesson 3: Problem-Solving Strategy: Guess and Check
Lesson 4: Use an Inch Ruler
Lesson 5: Measure Centimeters Using Models
Lesson 6: Use a Centimeter Ruler
Lesson 7: Understanding Area
Lesson 8: Problem-Solving Investigation:Choose a Strategy
Chapter 12 Review
You can measure the length of objects using non-standard units such as blocks, paper clips, or hands.
about 9 cubes
How many cubes long is the pencil?
How many paper clips long is the pencil?
Now measure the pencil using paper clips.
about 5 clips
What are some other things in our classroom that we can measure with paper clips?
What is the length of the crayon? Use connecting cubes to measure.
about 5 cubes
What are some other objects that are close to an inch long?
ticket
toy car
How long is this glue bottle? Use an object that is about an inch long to measure.
about 3 inches
How long is this shoe? Use an object that is about an inch long to measure. about 4 inches
Guess and check.Guess 1trophy 1: 5 pattern blockstrophy 2: 7 pattern blocksCheck: 5 + 7 does not equal 14. This guess is incorrect.
Guess and check.Guess 2trophy 1: 6 pattern blockstrophy 2: 8 pattern blocksCheck: 6 + 8 equals 14. This guess is correct. The longer trophy is 8 pattern blocks.
Guess and check to solve.
Lisa picked twice as many apples as Jenny. If they picked 18 apples in all, how many apples did Lisa pick?
12 apples
Measure the pencil. Write the measurement to the nearest inch.
about 9 inches
Measure the crayon. Write the measurement to the nearest inch.
about 4 inches
What are some other objects that are close to a centimeter long?
button
width of paperclip
How long is this piece of chalk? Use an object that is about a centimeter long to measure.
about 8 centimeters
How long is this crayon? Use an object that is about a centimeter long to measure.
about 9 centimeters
Feliz measured her shoe using a crayon. Her shoe is two crayons long. The crayon Feliz used was 7 centimeters long. How many centimeters long is her shoe?
14 centimeters
Measure the paper clip. Write the measurement to the nearest centimeter.
about 5 centimeters
Measure the pencil. Write the measurement to the nearest centimeter.
about 23 centimeters
How many orange squares does it take to cover the rectangle?
10 orange squares
One way is to make a table.
pebbles
inches
4
1
8
2
12
3
16
4
20
5
Holly’s hand is about 5 inches long.
Choose a strategy. Solve.
Joe had three quarters of an hour to finish his homework. How many minutes did Joe have to finish his homework?
45 minutes
The ____________ is how long or far away something is.
The ____________ is the space inside a shape or figure.
area length
Complete the sentences.
length
area
What is the length of this object to the nearest centimeter?
13 centimeters
Image Bank
Math Tools
Measure to the Nearest Inch
Measure to the Nearest Centimeter
