Grade 4/Addition
Column Addition: 3-Digit Regrouping (761)
Practice column addition with 3-digit numbers, including regrouping.
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Teacher Resources
Teaching Notes
Model ones→tens→hundreds addition. Write carries above the next column.
Common Mistakes
- Digits not aligned by place value
- Carry written but not added in next column
- Regrouping into the wrong place (adding 10 to ones)
- Forgetting to carry a regrouped digit.
- Incorrectly adding the carried digit.
- Misaligning digits by place value.
- Adding columns from left to right.
Differentiation
SupportUse base-ten blocks or visual aids to demonstrate regrouping.
ChallengeIntroduce problems with three addends or more digits.
Discussion Questions
- Why do we 'carry over' a number in addition?
- How does understanding place value help with regrouping?
- What would happen if you forgot to regroup?
- When might you use this skill in real life?
Learning Path
Skill Cluster
Number Sense & Operations
Estimated Time
10 minutes
Skills Practiced
column addition regroup
Prerequisites
- place_value_basics
- mental_addition_basics
- Single-Digit Addition (Basic Facts)
- Place Value (Tens and Hundreds)
- Column Addition (No Regrouping)
Next Steps
- Multi-Digit Subtraction (Regrouping)
- Addition Word Problems
- Estimation Strategies for Sums
- Column Addition: 4-Digit Regrouping
- Column Subtraction: 2 and 3-Digit Regrouping
- Addition Word Problems (2 & 3-Digit)