Free Grade 3 Working with Estimation Common Errors Lessons
Free Grade 3 lessons for Working with 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
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with estimation common errors
Explain working with estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with estimation common errors
Calculate working with estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with estimation common errors
Compare working with estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with estimation common errors
Justify working with 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 Working with 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 644 to the nearest 10.[1]
- 2.Round 845 to the nearest 10.[1]
- 3.Round 484 to the nearest 10.[1]
- 4.Round 726 to the nearest 10.[1]
- 5.Round 8,608 to the nearest 10.[2]
- 6.Round 5,298 to the nearest 100.[2]
- 7.Round 8,722 to the nearest 100.[2]
- 8.Round 7,131 to the nearest 100.[2]
- 9.Round 65,918 to the nearest 100.[3]
- 10.Round 69,114 to the nearest 100.[3]
- 11.Round 59,395 to the nearest 1,000.[3]
- 12.Round 53,386 to the nearest 100.[3]
Show answers and working
1. 640
Find the two multiples of 10 either side: 640 and 650. Look at the digit to the right of the rounding place: 5 or more rounds up. 644 rounds to 640.
2. 850
Find the two multiples of 10 either side: 840 and 850. Look at the digit to the right of the rounding place: 5 or more rounds up. 845 rounds to 850.
3. 480
Find the two multiples of 10 either side: 480 and 490. Look at the digit to the right of the rounding place: 5 or more rounds up. 484 rounds to 480.
4. 730
Find the two multiples of 10 either side: 720 and 730. Look at the digit to the right of the rounding place: 5 or more rounds up. 726 rounds to 730.
5. 8,610
Find the two multiples of 10 either side: 8600 and 8610. Look at the digit to the right of the rounding place: 5 or more rounds up. 8608 rounds to 8610.
6. 5,300
Find the two multiples of 100 either side: 5200 and 5300. Look at the digit to the right of the rounding place: 5 or more rounds up. 5298 rounds to 5300.
7. 8,700
Find the two multiples of 100 either side: 8700 and 8800. Look at the digit to the right of the rounding place: 5 or more rounds up. 8722 rounds to 8700.
8. 7,100
Find the two multiples of 100 either side: 7100 and 7200. Look at the digit to the right of the rounding place: 5 or more rounds up. 7131 rounds to 7100.
9. 65,900
Find the two multiples of 100 either side: 65900 and 66000. Look at the digit to the right of the rounding place: 5 or more rounds up. 65918 rounds to 65900.
10. 69,100
Find the two multiples of 100 either side: 69100 and 69200. Look at the digit to the right of the rounding place: 5 or more rounds up. 69114 rounds to 69100.
11. 59,000
Find the two multiples of 1000 either side: 59000 and 60000. Look at the digit to the right of the rounding place: 5 or more rounds up. 59395 rounds to 59000.
12. 53,400
Find the two multiples of 100 either side: 53300 and 53400. Look at the digit to the right of the rounding place: 5 or more rounds up. 53386 rounds to 53400.
Worked examples
Round 663 to the nearest 10.
- Find the two multiples of 10 either side: 660 and 670.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 663 rounds to 660.
- Answer: 660
Round 1,041 to the nearest 10.
- Find the two multiples of 10 either side: 1040 and 1050.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 1041 rounds to 1040.
- Answer: 1,040
Round 7,884 to the nearest 100.
- Find the two multiples of 100 either side: 7800 and 7900.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 7884 rounds to 7900.
- Answer: 7,900
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 Working with Estimation Common Errors lesson really free?
- Yes. Every lessons 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 Working with Estimation Word Problems, Working with Estimation Techniques, Introducing Estimation. Each one has its own free lesson, worksheet and quiz.
- How is the lesson 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 Working with Estimation Common Errors?
- Move on to Introducing Estimation, Estimation in Context, which build directly on this idea.
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