Addition Algorithms Mastery
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Addition Algorithms Mastery
🔢 Part 1: Place Value Understanding
a) 456 = _______ + _______ + _______
b) 1,847 = _______ + _______ + _______ + _______
c) 2,305 = _______ + _______ + _______ + _______
In 3,467, the digit 4 is in the:
ones place tens place hundreds place thousands placea) 2,894 = _________________________________
b) 5,067 = _________________________________
➕ Part 2: Vertical Column Addition
a) 347 + 186
Estimate: _______ + _______ = _______
Exact calculation:
b) 1,456 + 789
Estimate: _______ + _______ = _______
Exact calculation:
🔄 Part 3: Understanding Regrouping
2 5 7
+ 1 8 6
_______
Step 1: Add the ones: 7 + 6 = _____ Write _____ carry _____
Step 2: Add the tens: 5 + 8 + _____ = _____ Write _____ carry _____
Step 3: Add the hundreds: 2 + 1 + _____ = _____
Final answer: _______
🛒 Part 4: Real-Life Applications
• Backpack: $47
• Stationery set: $28
• Calculator: $35
• Art supplies: $19
Show your working using the vertical column method:
Total cost: $________
• Class 7A collected $284
• Class 7B collected $356
• Class 7C collected $198
a) Estimate the total: _______
b) Calculate the exact total:
c) Check your answer using subtraction:
🎯 Part 5: Challenge Problems
• Week 1: $1,247
• Week 2: $896
• Week 3: $1,358
• Week 4: $679
a) First, add Week 1 and Week 2:
b) Then add Week 3 and Week 4:
c) Finally, add your two subtotals:
Total fundraising amount: $________
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