Rounding Navigator Worksheet
Math Skills Lab Place Value & Estimation
Rounding Navigator
Name:
Date:
★ Rounding Rule: Find the lower & upper benchmark numbers and the midpoint.
0–4 → Round Down 5–9 → Round Up
1
Warm-Up: Round to the Nearest 10
Use the open number lines to label benchmarks & midpoint, plot the point, then round.
A. Round 47 to nearest 10 Example
40
45
▼ 47
50
47 is closer to 50
Answer: 50
B. Round 63 to nearest 10 Plot & Round
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mid
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Benchmark nearest:
Answer:
C. Round 85 to nearest 10 Plot & Round
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mid
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Benchmark nearest:
Answer:
D. Round 134 to nearest 10 Plot & Round
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mid
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Benchmark nearest:
Answer:
2
Target Practice: Round to the Nearest 100
Midpoints for hundreds end in 50 (e.g., 350, 650, 850).
1. Round 370 to nearest 100
300
350
400
Plot 370 on the line
Rounded:
2. Round 620 to nearest 100
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mid
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Label hundreds & plot
Rounded:
3. Round 450 to nearest 100
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mid
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Exactly on midpoint!
Rounded:
4. Round 885 to nearest 100
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mid
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Label hundreds & plot
Rounded:
Rounding Navigator • Page 1 of 2 Continue to Real-World Word Problems & Mixed Review ➔
Page 2
Fluency & Real-World Applications
Name:
3
Rapid Benchmark Table
Fill in the lower hundred, midpoint, upper hundred, and final rounded value.
| Number | Lower Hundred | Midpoint | Upper Hundred | Nearest 100 |
|---|
| 238 Ex. | 200 | 250 | 300 | 200 |
| 764 | ________ | ________ | ________ | ________ |
| 519 | ________ | ________ | ________ | ________ |
| 892 | ________ | ________ | ________ | ________ |
4
Real-World Story Problems
Read carefully, draw on the open number line, and state your answer.
Problem A: The Cosmic Bakery baked 438 star cookies for the annual city festival. To order bulk shipping boxes, the head baker rounds the cookie count to the nearest 100. How many cookies should the bakery estimate?
Open Number Line Support:
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mid
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Estimated Cookies:
cookies
Problem B: Maya recorded 76 vertical steps climbed on the nature trail before taking a water break. She wants to record her progress in her quick fitness journal rounded to the nearest 10. What number of steps should Maya record?
Open Number Line Support:
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mid
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Recorded Steps:
steps
Problem C: The Riverdale Animal Shelter collected 652 pounds of food during their community pet drive. The shelter manager needs to report this total to the newspaper rounded to the nearest 100. What number of pounds should be published?
Open Number Line Support:
____
mid
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Published Total:
lbs
Detective Challenge Find & Fix the Mistake!
Sam says: "549 rounded to the nearest 100 is 600 because 49 is super close to 50, and 50 rounds up!"
Explain why Sam is incorrect:
Correct Rounded Value:
Rounding Navigator • Page 2 of 2 Completed with Accuracy & Confidence! ★
