Three-Digit Number Addition
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Three-Digit Number Addition
🔢 Part 1: Understanding Three-Digit Numbers
Hundreds: _______ Tens: _______ Ones: _______
➕ Part 2: Adding Three-Digit Numbers
Step 1: Add the hundreds: 200 + 300 + 100 = _______
Step 2: Add the tens: 10 + 20 + 50 = _______
Step 3: Add the ones: 4 + 5 + 3 = _______
Total: _______ + _______ + _______ = _______
a) 123 + 234 + 112 = _______
b) 315 + 142 + 203 = _______
c) 456 + 123 + 321 = _______
🎯 Part 3: Estimation and Reasonableness
Problem: 189 + 234 + 176
Round to nearest hundred: _____ + _____ + _____ = _____ (estimate)
Actual calculation:
Is your answer reasonable? Circle: Yes / No
🧮 Part 4: Problem Solving
Answer: They raised $_______ altogether.
Answer: The library has _______ books in total.
✅ Part 5: Self-Assessment
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