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We can think about place value to help us subtract.
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Pick the correct way to decompose 35 into 10s and ones.
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Subtract 18 from 35 by following these steps.
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Regroup one 10 into 10 ones.
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Take away eight ones.
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Take away one 10.
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35 take away 18 equals what?
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In this question, we need to think about place value.
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We’re asked to decompose the number 35 into 10s and ones.
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And we’re given four possible answers.
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We can partition the number 35 into 10s and ones.
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The five is worth five ones, and the three in 35 is worth three 10s, or 30.
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So, we’re looking for the place value chart which shows us three 10s and five ones.
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The first of our four models shows three 10s and five ones.
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So, this is the correct way to decompose 35 into 10s and ones.
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Next, we have to subtract 18 from 35.
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And we’re told to follow these steps.
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First, regroup one 10 into 10 ones.
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This step has already been done for us.
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There were three 10s in 35, and one 10 has been taken away.
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Now, there are two 10s.
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This 10 has been exchanged for 10 ones.
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We took one 10 and exchanged it for 10 ones.
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We did have five ones in 35.
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Now, we have 15 ones.
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Next, we’re asked to take away the eight ones.
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What is 15 take away eight?
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The answer is seven.
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Finally, we have to take away one 10.
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Two take away one equals one.
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35 take away 18 equals 17.
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We thought about place value to help us subtract.
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We picked the correct way to decompose 35 into 10s and ones.
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The first-place value chart shows three 10s and five ones.
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Then, we subtracted 18 from 35 by following the steps.
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First, we regrouped one 10 into 10 ones.
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Then, we took away eight ones and one 10 to give us our answer of 17.
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35 take away 18 equals 17.