Partitioning Rectangles

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# Partitioning Rectangles - PowerPoint PPT Presentation

Partitioning Rectangles. Lesson 6.14:. More or Less. Let’s count by tens. How many dimes are shown? What is the value of 6 dimes? 60 cents. More or Less. What is 5 cents more? 65 cents. Give the number sentence. 60 cents + 5 cents = 65 cents. More or Less. What is 10 cents less?

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## PowerPoint Slideshow about 'Partitioning Rectangles' - ingrid-franks

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Presentation Transcript

### Partitioning Rectangles

Lesson 6.14:

More or Less
• Let’s count by tens.
• How many dimes are shown?
• What is the value of 6 dimes?
• 60 cents
More or Less
• What is 5 cents more?
• 65 cents.
• Give the number sentence.
• 60 cents + 5 cents = 65 cents.
More or Less
• What is 10 cents less?
• Give the number sentence.
• 65 cents – 10 cents = 55 cents
More or Less
• Let’s count by tens.
• What is the value of 7 dimes?
• What is the value if I remove 3 dimes?
• Give the number sentence.
• What is the value?
• Give the number sentence.
Concept Development
• Today we’re going to use the BLM 6.14 for our lesson! We’ll use the sentence frames to record our answers and to speak in complete sentences.
• Pass out the template, BLM 6.14, and scissors.
• Cut Rectangle A into rows and complete Problem 1. Share your responses and thinking with your partner.
• Cut Rectangle B into columns and complete Problem 2. Share again.
• Put both rectangles back together again.
Concept Development
• Move the columns of Rectangle B so they are sitting directly on top of the rows of Rectangle A with no gaps or overlaps.
• They both show the same amount, and they’re both the same size and shape.
• We can see the same rectangle different ways: it’s 2 rows of 4, 4 columns of 2 or, 8 squares.
• You’ve recognized that we can decompose the same rectangle into rows, columns or unit squares.
Concept Development
• Take both your rows of 4 and cut them to show 4 twos instead of 2 fours.
• Imagine we were going to put 2 rows on top to make the exact same rectangle. Talk to your partner.
• Explain what those rectangles would be.
• It would be 2 rows of 8. They would be 2 of the long skinny rectangles.
• We can decompose this rectangle into 2 rows of 8 or 8 columns of 2.
Concept Development
• Cut out all your squares from Rectangles A and B.
• How many squares do you have now?
• 16