Free Grade 3 Introducing Estimation Common Errors Worksheets
Free Grade 3 worksheets for Introducing Estimation Common Errors: 12 real questions with a full answer key and worked solutions. Rounding gives a simpler number that is close to the real one. Look at the digit just right of the place you round to: 5 or more rounds up, 4 or less rounds down.
Free
Core
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing estimation common errors
Explain introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing estimation common errors
Calculate introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing estimation common errors
Compare introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing estimation common errors
Justify introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introducing Estimation Common Errors works
Rounding gives a simpler number that is close to the real one. Look at the digit just right of the place you round to: 5 or more rounds up, 4 or less rounds down.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Round 321 to the nearest 10.[1]
- 2.Round 417 to the nearest 10.[1]
- 3.Round 553 to the nearest 10.[1]
- 4.Round 733 to the nearest 10.[1]
- 5.Round 826 to the nearest 100.[2]
- 6.Round 9,097 to the nearest 10.[2]
- 7.Round 8,769 to the nearest 10.[2]
- 8.Round 5,026 to the nearest 100.[2]
- 9.Round 58,571 to the nearest 100.[3]
- 10.Round 45,362 to the nearest 100.[3]
- 11.Round 19,912 to the nearest 1,000.[3]
- 12.Round 60,838 to the nearest 1,000.[3]
Show answers and working
1. 320
Find the two multiples of 10 either side: 320 and 330. Look at the digit to the right of the rounding place: 5 or more rounds up. 321 rounds to 320.
2. 420
Find the two multiples of 10 either side: 410 and 420. Look at the digit to the right of the rounding place: 5 or more rounds up. 417 rounds to 420.
3. 550
Find the two multiples of 10 either side: 550 and 560. Look at the digit to the right of the rounding place: 5 or more rounds up. 553 rounds to 550.
4. 730
Find the two multiples of 10 either side: 730 and 740. Look at the digit to the right of the rounding place: 5 or more rounds up. 733 rounds to 730.
5. 800
Find the two multiples of 100 either side: 800 and 900. Look at the digit to the right of the rounding place: 5 or more rounds up. 826 rounds to 800.
6. 9,100
Find the two multiples of 10 either side: 9090 and 9100. Look at the digit to the right of the rounding place: 5 or more rounds up. 9097 rounds to 9100.
7. 8,770
Find the two multiples of 10 either side: 8760 and 8770. Look at the digit to the right of the rounding place: 5 or more rounds up. 8769 rounds to 8770.
8. 5,000
Find the two multiples of 100 either side: 5000 and 5100. Look at the digit to the right of the rounding place: 5 or more rounds up. 5026 rounds to 5000.
9. 58,600
Find the two multiples of 100 either side: 58500 and 58600. Look at the digit to the right of the rounding place: 5 or more rounds up. 58571 rounds to 58600.
10. 45,400
Find the two multiples of 100 either side: 45300 and 45400. Look at the digit to the right of the rounding place: 5 or more rounds up. 45362 rounds to 45400.
11. 20,000
Find the two multiples of 1000 either side: 19000 and 20000. Look at the digit to the right of the rounding place: 5 or more rounds up. 19912 rounds to 20000.
12. 61,000
Find the two multiples of 1000 either side: 60000 and 61000. Look at the digit to the right of the rounding place: 5 or more rounds up. 60838 rounds to 61000.
Worked examples
Round 536 to the nearest 10.
- Find the two multiples of 10 either side: 530 and 540.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 536 rounds to 540.
- Answer: 540
Round 5,706 to the nearest 100.
- Find the two multiples of 100 either side: 5700 and 5800.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 5706 rounds to 5700.
- Answer: 5,700
Round 93,063 to the nearest 1,000.
- Find the two multiples of 1000 either side: 93000 and 94000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 93063 rounds to 93000.
- Answer: 93,000
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Looks at the wrong digit to decide whether to round up.
Correction: Underline the rounding place, then circle the digit to its right.
Changes the digits after the rounding place to anything other than 0.
Correction: Every digit after the rounding place becomes 0.
Teacher tips
- · Use a number line showing the two multiples either side.
Parent tips
- · Estimate the shopping bill to the nearest dollar.
Real-life applications
- · Estimating the total of a shopping trip before paying.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Introducing Estimation Common Errors worksheet really free?
- Yes. Every worksheets on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Introducing Estimation Word Problems, Introducing Estimation Techniques, Rounding. Each one has its own free lesson, worksheet and quiz.
- How is the worksheet sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Estimation Common Errors?
- Move on to Working with Estimation, Estimation in Context, which build directly on this idea.
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