Addition Subtraction Regrouping Algorithms
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Addition Subtraction Regrouping Algorithms
🎯 WALT (We Are Learning To)
We are learning to use regrouping algorithms to solve addition and subtraction problems accurately.
Success Criteria:
✓ I can add numbers with regrouping (carrying)
✓ I can subtract numbers with regrouping (borrowing)
✓ I can explain my working steps
✓ I can solve word problems using these algorithms
📊 Part 1: Vertical Addition and Subtraction
a) 347 + 268 = _______
b) 529 + 387 = _______
c) 1,456 + 789 = _______
a) 523 - 187 = _______
b) 804 - 356 = _______
c) 1,000 - 467 = _______
a) 2_4 + 1_8 = 462
b) 6_3 - 2_7 = 386
a) A school library has 1,247 fiction books and 568 non-fiction books. How many books are there altogether?
b) There were 802 students at the school concert. 349 students left during interval. How many students stayed for the second half?
🧠 Part 2: Thinking and Extension
738 + 294
My estimate: _______
Actual answer: _______
Was my estimate close? _______
When subtracting 456 - 189, why do you need to regroup? Explain the steps you would take.
Add three numbers with regrouping: 347 + 289 + 176 = _______
Show your strategy for adding three numbers efficiently:
Write a word problem that requires subtraction with regrouping. Include the answer.
🎯 Differentiation Support
Need Help? Use place value blocks or draw pictures to show regrouping
Confident? Try the challenge problem and create your own multi-step word problems
Extension: Research and explain a different algorithm for addition or subtraction
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