Regrouping in Addition
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Questions and Answers

What is the purpose of regrouping in addition?

  • To multiply digits in a column
  • To handle sums greater than 10 in a column (correct)
  • To subtract digits in a column
  • To divide digits in a column

    • What do you do when the sum of the digits in a column is greater than 10?

  • Multiply the sum by 10
  • Stop adding and move to the next column
  • Subtract the extra tens from the sum
  • Regroup the extra tens to the next column (correct)

    • What is the correct order of steps when regrouping in addition?

  • Check for regrouping, add the digits, carry the tens, repeat the process
  • Add the digits, check for regrouping, carry the tens, repeat the process (correct)
  • Repeat the process, add the digits, check for regrouping, carry the tens
  • Carry the tens, add the digits, check for regrouping, repeat the process

    • What is the result of adding 45 and 27 using regrouping?

    <p>72</p> Signup and view all the answers

    What happens to the extra tens when regrouping in addition?

    <p>They are carried to the next column</p> Signup and view all the answers

    What is the correct step when adding 94 and 35 using regrouping?

    <p>Add 9 and 3 and 0 in the tens column</p> Signup and view all the answers

    Study Notes

    Regrouping in Addition

    What is Regrouping?

    • Regrouping is a strategy used in addition to handle situations where the sum of two or more digits in a column is greater than 10.
    • It involves "carrying" or "regrouping" the extra tens to the next column.

    How to Regroup

    1. Add the digits: Add the digits in each column as usual.
    2. Check for regrouping: If the sum of the digits in a column is greater than 10, regroup the extra tens to the next column.
    3. Carry the tens: Add the regrouped tens to the next column.
    4. Repeat the process: Continue adding and regrouping until all columns have been added.

    Examples

    • 45 + 27 =
      • Add the digits in the ones column: 5 + 7 = 12
      • Regroup the extra tens: 1 ten carried to the tens column
      • Add the digits in the tens column: 4 + 2 + 1 = 7
      • Answer: 72
    • 94 + 35 =
      • Add the digits in the ones column: 4 + 5 = 9
      • Add the digits in the tens column: 9 + 3 + 0 = 12
      • Regroup the extra tens: 1 ten carried to the hundreds column
      • Answer: 129

    Regrouping in Addition

    • Regrouping is a strategy used in addition to handle situations where the sum of two or more digits in a column is greater than 10.
    • It involves "carrying" or "regrouping" the extra tens to the next column.

    Steps to Regroup

    • Add the digits in each column as usual.
    • Check if the sum of the digits in a column is greater than 10, and regroup the extra tens to the next column.
    • Carry the regrouped tens to the next column.
    • Continue adding and regrouping until all columns have been added.

    Example Walkthroughs

    45 + 27

    • Add the digits in the ones column: 5 + 7 = 12
    • Regroup the extra tens: 1 ten carried to the tens column
    • Add the digits in the tens column: 4 + 2 + 1 = 7
    • Answer: 72

    94 + 35

    • Add the digits in the ones column: 4 + 5 = 9
    • Add the digits in the tens column: 9 + 3 + 0 = 12
    • Regroup the extra tens: 1 ten carried to the hundreds column
    • Answer: 129

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    Description

    Learn about regrouping in addition, a strategy to handle sums greater than 10, involving carrying extra tens to the next column.

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