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Take Away Subtraction With Regrouping Base 10 Blocks Allan and Scott
Problem: Build 32 on the top portion of the Subtraction Mat. How many tens? Record it. How many ones? Record it. How much is that?
Write minus seventeen on the middle portion of the mat.
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.
Remove seven ones and place them below the line on the small sheet.
How many ones left on the Subtraction Mat? (5) Pull them to the bottom portion of the Mat and record.
Remove one of the tens and place it below the line on the small sheet.
How many tens left on the Subtraction Mat? (1) Pull it to the bottom portion of the Mat and record.
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