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 (B)</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 (B)</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 (A)</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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