Grade 3/Subtraction
Subtract 3-Digit Numbers in Columns (468)
Practice subtracting 3-digit numbers using column format. Students learn regrouping (borrowing) and place value concepts while solving vertical subtraction problems.
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Teacher Resources
Teaching Notes
Emphasize place value understanding during regrouping. Model crossing out and writing new digits clearly.
Vocabulary
Regroup: Borrowing from a higher place value.
Place Value: The value of a digit based on its position.
Common Mistakes
- Forgetting to regroup or borrowing incorrectly.
- Subtracting the smaller digit from the larger, regardless of position.
- Misaligning digits by place value in column format.
Differentiation
SupportUse base-ten blocks to physically model regrouping steps.
ChallengeSolve multi-step word problems involving 3-digit subtraction.
Discussion Questions
- When do you need to regroup when subtracting?
- How does place value help you subtract in columns?
- What strategy can you use to check your answer?
- Can you explain regrouping to a classmate?
Extension Activities
- Subtract 2-digit numbers.
- Use addition to check.
- Create word problems.
Parent Tip
Use coins or blocks to model regrouping for subtraction.
Learning Path
Skill Cluster
Number & Operations in Base Ten
Estimated Time
15 minutes
Skills Practiced
subtracting 3 digit numbersregrouping in subtractioncolumn subtraction
Prerequisites
- Subtracting 2-Digit Numbers
- Understanding Place Value
Next Steps
- Subtracting 3-Digit Numbers Across Zeros
- Subtracting 4-Digit Numbers
- Subtract 3-Digit Numbers Across Zeros
- Subtract 4-Digit Numbers in Columns
- Estimation with Subtraction