splash screen select a hyperlink to go to the corresponding slides. chapter menu introducing chapter...
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Select a hyperlink to go to the corresponding slides.
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
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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?
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How many paper clips long is the pencil?
Now measure the pencil using paper clips.
about 5 clips
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What are some other things in our classroom that we can measure with paper clips?
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What is the length of the crayon? Use connecting cubes to measure.
about 5 cubes
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What are some other objects that are close to an inch long?
ticket
toy car
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How long is this glue bottle? Use an object that is about an inch long to measure.
about 3 inches
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How long is this shoe? Use an object that is about an inch long to measure. about 4 inches
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Guess and check.Guess 1trophy 1: 5 pattern blockstrophy 2: 7 pattern blocksCheck: 5 + 7 does not equal 14. This guess is incorrect.
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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.
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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
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Measure the pencil. Write the measurement to the nearest inch.
about 9 inches
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Measure the crayon. Write the measurement to the nearest inch.
about 4 inches
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What are some other objects that are close to a centimeter long?
button
width of paperclip
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How long is this piece of chalk? Use an object that is about a centimeter long to measure.
about 8 centimeters
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How long is this crayon? Use an object that is about a centimeter long to measure.
about 9 centimeters
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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
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Measure the paper clip. Write the measurement to the nearest centimeter.
about 5 centimeters
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Measure the pencil. Write the measurement to the nearest centimeter.
about 23 centimeters
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How many orange squares does it take to cover the rectangle?
10 orange squares
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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.
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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
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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
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What is the length of this object to the nearest centimeter?
13 centimeters
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Image Bank
Math Tools
Measure to the Nearest Inch
Measure to the Nearest Centimeter
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