Shark Learning
Second/Place Value Rounding

Estimating with Rounding Word Problems

Word problems requiring estimation using rounding to tens, hundreds or thousands.
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Study Guide

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Practice Questions

  1. Mia read 427 pages one week and 589 pages the next. Estimate the total pages she read.
    Show answer

    ~1,000

  2. A factory made 3,182 toy cars in January and 4,761 in February. Estimate the total cars made.
    Show answer

    ~8,000

  3. There are 1,249 students and 2,876 visitors at a fair. Estimate how many people are there in all.
    Show answer

    ~4,000

  4. A truck travels 238 miles Monday and 421 miles Tuesday. Estimate total miles.
    Show answer

    ~600

  5. A book costs $18.49 and a journal costs $12.09. Estimate the total cost.
    Show answer

    ~$30

Teacher Resources
Teaching Notes

Have students justify the place value they chose for rounding.

Vocabulary
Estimate: Find an approximate answer.
Round: Change a number to a simpler value.
Common Mistakes
  • Rounding one number but not the other
  • Using exact values instead of rounded
  • Rounding to an inappropriate place
  • Calculating precisely instead of estimating
  • Forgetting to show rounded numbers
  • Misinterpreting word problem context
Differentiation
SupportProvide a place value hint (circle digit).
ChallengeCompare two different rounding levels (tens vs hundreds).
Discussion Questions
  • Why might rounding to hundreds be better than tens here?
  • When is it helpful to estimate instead of calculate exactly?
  • How do you choose which place value to round to?
  • Can two people estimate the same problem differently?
  • Why is showing rounded numbers important?
Extension Activities
  • Estimate before solving exactly and compare error magnitudes
Parent Tip

Ask your child to estimate the total cost of two items at the store.

Learning Path
Skill Cluster

Number Sense & Operations

Estimated Time

15 minutes

Skills Practiced
Estimation rounding