MathematicsFreePrintable
Rounding and Addition Practice
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Rounding and Addition Practice
🎯 Part 1: Rounding Practice
1. Round 347 to the nearest hundred.
300
350
400
2. Round 582 to the nearest ten.
580
590
600
3. Round 729 to the nearest hundred.
Answer: _____________
4. Round 156 to the nearest ten.
Answer: _____________
🧮 Part 2: Estimate First, Then Add
5. Estimate the sum by rounding to the nearest hundred, then find the exact sum.
243 + 378
Round 243 to: _______ Round 378 to: _______
Estimated sum: _______
Exact sum: _______
6. Estimate the sum by rounding to the nearest hundred, then find the exact sum.
532 + 486
Round 532 to: _______ Round 486 to: _______
Estimated sum: _______
Exact sum: _______
7. Which estimation is closest to the actual sum of 445 + 335?
700
800
900
💭 Part 3: Explain Your Thinking
8. Explain why rounding helps us check if our addition answers are reasonable.
9. Look at this problem: 267 + 189. Without solving exactly, explain how you would estimate the answer.
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