This Grade 5 estimation worksheet introduces rounding to the nearest 10, 100, and 1000, plus front-end estimation for two-digit and three-digit whole numbers. Students practice short answer, fill-in-the-blank, and sentence correction items using money and whole-number contexts. The sheet builds confidence in identifying which digit triggers rounding and shows how to apply the leading-digit rule for fast and accurate mental math estimates daily.
Style:
Estimation Strategies
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
To round 487 to the nearest 100, I get 400.
Rewrite: To round 487 to the nearest 100, I get 500.
2. Fix the sentence:
Front-end estimate of 24 + 38 is 2 + 3 = 5.
Rewrite: Front-end estimate of 24 + 38 is 20 + 30 = 50.
3. Fix the sentence:
Rounded to the nearest 10, 76 becomes 70.
Rewrite: Rounded to the nearest 10, 76 becomes 80.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Rounded to the nearest 10, 47 is 50.
2. Rounded to the nearest 100, 312 is 300.
3. The front-end estimate of 58 + 23 is 70.
4. Rounded to the nearest whole number, 6.7 is 7.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Estimate 24 + 38 by rounding each addend to the nearest 10.
20 + 40 = 60
2. Estimate $4.85 to the nearest dollar for a quick total.
$5
Estimation Strategies
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
To round 487 to the nearest 100, I get 400.
Rewrite: To round 487 to the nearest 100, I get 500.
2) Fix the sentence:
Front-end estimate of 24 + 38 is 2 + 3 = 5.
Rewrite: Front-end estimate of 24 + 38 is 20 + 30 = 50.
3) Fix the sentence:
Rounded to the nearest 10, 76 becomes 70.
Rewrite: Rounded to the nearest 10, 76 becomes 80.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) Rounded to the nearest 10, 47 is 50.
2) Rounded to the nearest 100, 312 is 300.
3) The front-end estimate of 58 + 23 is 70.
4) Rounded to the nearest whole number, 6.7 is 7.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Estimate 24 + 38 by rounding each addend to the nearest 10.
20 + 40 = 60
2) Estimate $4.85 to the nearest dollar for a quick total.
$5
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9 Questions
15-20 minutes
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