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Fourth/Addition

Add 2-Digit Numbers with Regrouping

Add two 2-digit numbers with regrouping (carrying). Line up the numbers in columns. Example: 38 + 27 = 65
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Study Guide

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Add 2-Digit Numbers with Regrouping preview

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Practice Questions

  1. 47 + 38 = ?
    Show answer

    85

  2. 56 + 29 = ?
    Show answer

    85

  3. 68 + 17 = ?
    Show answer

    85

  4. 49 + 36 = ?
    Show answer

    85

  5. 58 + 27 = ?
    Show answer

    85

Quick Tip
Line up the ones and tens. Add ones first. If 10 or more, carry 1 to the tens place.
Teacher Resources
Teaching Notes

Emphasize place value and the concept of regrouping ten ones as one ten. Encourage students to start adding from the ones column.

Vocabulary
Regroup: To exchange 10 ones for 1 ten, or 10 tens for 1 hundred.
Carry over: Moving a value to the next higher place value column.
Common Mistakes
  • Forgetting to regroup (carry over) the tens.
  • Adding the tens column before the ones column.
  • Incorrectly adding the regrouped number.
Differentiation
SupportUse base ten blocks or place value charts for concrete representation.
ChallengeChallenge with mental addition strategies or three 2-digit numbers.
Discussion Questions
  • Why is it important to start adding from the ones place?
  • What does 'regrouping' mean when adding numbers?
  • How is regrouping similar to bundling sticks or counting groups of ten?
  • What would happen if you forgot to regroup in an addition problem?
Extension Activities
  • Add prices with regrouping.
  • Solve word problems.
  • Play regrouping games.
Parent Tip

Use base-ten blocks to visually demonstrate regrouping ones into tens.

Learning Path
Skill Cluster

Number Operations and Place Value

Estimated Time

15 minutes

Skills Practiced
Two digit additionAddition with regrouping