Let’s solve each problem one by one. We’ll add the numbers first, then round the total to the nearest hundred.
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Problem 1:
Mandy has 453 blue Legos and 381 green Legos.
Add:
453 + 381 = 834
Now round 834 to the nearest hundred.
Look at the tens digit (3). Since it’s less than 5, we round down.
→ 800
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Problem 2:
Ben scored 379, Stephanie scored 661.
Add:
379 + 661 = 1040
Round 1040 to the nearest hundred.
Tens digit is 4 → less than 5 → round down.
→ 1000
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Problem 3:
Last year: 276 hours
This year: 314 hours
Add:
276 + 314 = 590
Round 590 to the nearest hundred.
Tens digit is 9 → greater than or equal to 5 → round up.
→ 600
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Problem 4:
Carl: $199
Steve: $150
Shane: $230
Add:
199 + 150 = 349
349 + 230 = 579
Round 579 to the nearest hundred.
Tens digit is 7 → round up.
→ 600
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Problem 5:
Chirps in three trials: 389, 452, 505
Add:
389 + 452 = 841
841 + 505 = 1346
Round 1346 to the nearest hundred.
Tens digit is 4 → round down.
→ 1300
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Final Answer:
1. 800
2. 1000
3. 600
4. 600
5. 1300
Parent Tip: Review the logic above to help your child master the concept of rounding word problems worksheet.
