Grade 5 students continue building decimal estimation skills with rounding to tenths and hundredths, money totals, and quick mental math sums. Spot-the-error items show common mistakes like rounding down when the next digit is 5 or more. Fill-in and short-answer questions ask Grade 5 learners to round each amount, add the friendly numbers, and explain why estimates work for everyday shopping situations.
Style:
Estimation Strategies
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Round 0.847 to the nearest tenth: 0.7 because we cut off the extras.
Rewrite: Round 0.847 to the nearest tenth: 0.8 because the hundredths digit is 4.
2. Fix the sentence:
Estimate $1.99 plus $4.05 as $1 plus $4, totaling $5.
Rewrite: Estimate $1.99 plus $4.05 as $2 plus $4, totaling $6.
3. Fix the sentence:
Round 12.345 to the nearest hundredth: 12.34 by ignoring the last digit.
Rewrite: Round 12.345 to the nearest hundredth: 12.35 because the thousandths digit is 5.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Round 3.629 to the nearest tenth to get 3.6.
2. Round 8.475 to the nearest hundredth to get 8.48.
3. Estimate $9.85 plus $4.10 by rounding to whole dollars to get $14.
4. If a book costs $7.20 and you pay with $10, estimated change is about $3.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. How would a Grade 5 student round 4.572 to the nearest tenth, and why?
Look at the hundredths digit, which is 7. Since 7 is greater than 5, the tenths digit rounds up from 5 to 6, giving 4.6.
2. Describe how to estimate the total of three items priced $2.95, $1.80, and $4.10.
Round each price to the nearest dollar to get $3, $2, and $4. Add the rounded amounts to get an estimated total of about $9.
Estimation Strategies
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
Round 0.847 to the nearest tenth: 0.7 because we cut off the extras.
Rewrite: Round 0.847 to the nearest tenth: 0.8 because the hundredths digit is 4.
2) Fix the sentence:
Estimate $1.99 plus $4.05 as $1 plus $4, totaling $5.
Rewrite: Estimate $1.99 plus $4.05 as $2 plus $4, totaling $6.
3) Fix the sentence:
Round 12.345 to the nearest hundredth: 12.34 by ignoring the last digit.
Rewrite: Round 12.345 to the nearest hundredth: 12.35 because the thousandths digit is 5.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) Round 3.629 to the nearest tenth to get 3.6.
2) Round 8.475 to the nearest hundredth to get 8.48.
3) Estimate $9.85 plus $4.10 by rounding to whole dollars to get $14.
4) If a book costs $7.20 and you pay with $10, estimated change is about $3.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) How would a Grade 5 student round 4.572 to the nearest tenth, and why?
Look at the hundredths digit, which is 7. Since 7 is greater than 5, the tenths digit rounds up from 5 to 6, giving 4.6.
2) Describe how to estimate the total of three items priced $2.95, $1.80, and $4.10.
Round each price to the nearest dollar to get $3, $2, and $4. Add the rounded amounts to get an estimated total of about $9.
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