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Published byMiguel McCabe Modified over 4 years ago

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Take Away Subtraction With Regrouping Base 10 Blocks Allan and Scott

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Problem: 32 - 17 Build 32 on the top portion of the Subtraction Mat. How many tens? Record it. How many ones? Record it. How much is that?

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32

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Write minus seventeen on the middle portion of the mat.

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32 -17

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Is it possible to take away seven ones? (no) Exchange a ten for 10 ones and place them on the ones portion of the mat. Record the exchange.

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32 -17 122

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Remove seven ones and place them below the line on the small sheet.

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23 -17 122

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How many ones left on the Subtraction Mat? (5) Pull them to the bottom portion of the Mat and record.

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3 122 2 -17 5

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Remove one of the tens and place it below the line on the small sheet.

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3 122 2 -17 5

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How many tens left on the Subtraction Mat? (1) Pull it to the bottom portion of the Mat and record.

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3 122 2 -17 5 1

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