Free Grade 3 Working with Estimation in Context Common Errors: Common Mistakes Worksheets
Free Grade 3 worksheets for Working with Estimation in Context Common Errors: Common Mistakes: 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
Stretch
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with estimation in context common errors: common mistakes
Explain working with estimation in context common errors: common mistakes accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with estimation in context common errors: common mistakes
Calculate working with estimation in context common errors: common mistakes accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with estimation in context common errors: common mistakes
Compare working with estimation in context common errors: common mistakes accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with estimation in context common errors: common mistakes
Justify working with estimation in context common errors: common mistakes 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 in Context Common Errors: Common Mistakes 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 387 to the nearest 10.[1]
- 2.Round 916 to the nearest 10.[1]
- 3.Round 889 to the nearest 10.[1]
- 4.Round 600 to the nearest 10.[1]
- 5.Round 6,980 to the nearest 100.[2]
- 6.Round 2,937 to the nearest 100.[2]
- 7.Round 9,987 to the nearest 100.[2]
- 8.Round 4,928 to the nearest 100.[2]
- 9.Round 97,830 to the nearest 100.[3]
- 10.Round 79,290 to the nearest 1,000.[3]
- 11.Round 66,843 to the nearest 1,000.[3]
- 12.Round 86,557 to the nearest 1,000.[3]
Show answers and working
1. 390
Find the two multiples of 10 either side: 380 and 390. Look at the digit to the right of the rounding place: 5 or more rounds up. 387 rounds to 390.
2. 920
Find the two multiples of 10 either side: 910 and 920. Look at the digit to the right of the rounding place: 5 or more rounds up. 916 rounds to 920.
3. 890
Find the two multiples of 10 either side: 880 and 890. Look at the digit to the right of the rounding place: 5 or more rounds up. 889 rounds to 890.
4. 600
Find the two multiples of 10 either side: 600 and 600. Look at the digit to the right of the rounding place: 5 or more rounds up. 600 rounds to 600.
5. 7,000
Find the two multiples of 100 either side: 6900 and 7000. Look at the digit to the right of the rounding place: 5 or more rounds up. 6980 rounds to 7000.
6. 2,900
Find the two multiples of 100 either side: 2900 and 3000. Look at the digit to the right of the rounding place: 5 or more rounds up. 2937 rounds to 2900.
7. 10,000
Find the two multiples of 100 either side: 9900 and 10000. Look at the digit to the right of the rounding place: 5 or more rounds up. 9987 rounds to 10000.
8. 4,900
Find the two multiples of 100 either side: 4900 and 5000. Look at the digit to the right of the rounding place: 5 or more rounds up. 4928 rounds to 4900.
9. 97,800
Find the two multiples of 100 either side: 97800 and 97900. Look at the digit to the right of the rounding place: 5 or more rounds up. 97830 rounds to 97800.
10. 79,000
Find the two multiples of 1000 either side: 79000 and 80000. Look at the digit to the right of the rounding place: 5 or more rounds up. 79290 rounds to 79000.
11. 67,000
Find the two multiples of 1000 either side: 66000 and 67000. Look at the digit to the right of the rounding place: 5 or more rounds up. 66843 rounds to 67000.
12. 87,000
Find the two multiples of 1000 either side: 86000 and 87000. Look at the digit to the right of the rounding place: 5 or more rounds up. 86557 rounds to 87000.
Worked examples
Round 865 to the nearest 10.
- Find the two multiples of 10 either side: 860 and 870.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 865 rounds to 870.
- Answer: 870
Round 9,395 to the nearest 10.
- Find the two multiples of 10 either side: 9390 and 9400.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 9395 rounds to 9400.
- Answer: 9,400
Round 74,891 to the nearest 100.
- Find the two multiples of 100 either side: 74800 and 74900.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 74891 rounds to 74900.
- Answer: 74,900
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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- Start with Working with Estimation in Context Common Errors: Visual Models, Working with Estimation in Context Common Errors: Worked Examples, Rules and Methods in Estimation in Context Common Errors. Each one has its own free lesson, worksheet and quiz.
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- What comes next after Working with Estimation in Context Common Errors: Common Mistakes?
- Move on to Working with Estimation in Context Common Errors: Real-life Applications, Introduction to Estimation in Context Common Errors, Key Vocabulary of Estimation in Context Common Errors, Rules and Methods in Estimation in Context Common Errors, which build directly on this idea.
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