Adding and Subtracting 3-Digit Numbers
4th GradeMath25 min
Learning Objective
I can add and subtract three-digit numbers using the standard algorithm, showing regrouping when needed.
Lesson Flow
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Math Antics - Multi-Digit Subtraction
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Guided Notes
Key concepts students will learn:
- •
When rewriting a multi-digit subtraction problem, the number you are taking from goes on top, and the number you are taking away goes on the bottom.
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When subtracting, always start with the ones place column, and if the top digit is smaller than the bottom digit, you need to borrow.
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If you need to borrow from a digit that is zero, you have to borrow from the next two digits instead of just one.
Practice
3 questions • Multiple choice & Short answer
Exit Ticket
“Solve 523 - 156 using the standard algorithm. Show your regrouping.”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
