Free Grade 3 Working with Estimation in Context Common Errors: Real-life Applications Lessons
Free Grade 3 lessons for Working with Estimation in Context Common Errors: Real-life Applications: 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
20 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: real-life applications
Explain working with estimation in context common errors: real-life applications accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with estimation in context common errors: real-life applications
Calculate working with estimation in context common errors: real-life applications accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with estimation in context common errors: real-life applications
Compare working with estimation in context common errors: real-life applications accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with estimation in context common errors: real-life applications
Justify working with estimation in context common errors: real-life applications 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: Real-life Applications 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 908 to the nearest 10.[1]
- 2.Round 294 to the nearest 10.[1]
- 3.Round 974 to the nearest 10.[1]
- 4.Round 867 to the nearest 10.[1]
- 5.Round 3,036 to the nearest 10.[2]
- 6.Round 3,260 to the nearest 100.[2]
- 7.Round 4,724 to the nearest 10.[2]
- 8.Round 4,364 to the nearest 100.[2]
- 9.Round 94,376 to the nearest 100.[3]
- 10.Round 76,955 to the nearest 100.[3]
- 11.Round 68,024 to the nearest 100.[3]
- 12.Round 2,031 to the nearest 1,000.[3]
Show answers and working
1. 910
Find the two multiples of 10 either side: 900 and 910. Look at the digit to the right of the rounding place: 5 or more rounds up. 908 rounds to 910.
2. 290
Find the two multiples of 10 either side: 290 and 300. Look at the digit to the right of the rounding place: 5 or more rounds up. 294 rounds to 290.
3. 970
Find the two multiples of 10 either side: 970 and 980. Look at the digit to the right of the rounding place: 5 or more rounds up. 974 rounds to 970.
4. 870
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. 867 rounds to 870.
5. 3,040
Find the two multiples of 10 either side: 3030 and 3040. Look at the digit to the right of the rounding place: 5 or more rounds up. 3036 rounds to 3040.
6. 3,300
Find the two multiples of 100 either side: 3200 and 3300. Look at the digit to the right of the rounding place: 5 or more rounds up. 3260 rounds to 3300.
7. 4,720
Find the two multiples of 10 either side: 4720 and 4730. Look at the digit to the right of the rounding place: 5 or more rounds up. 4724 rounds to 4720.
8. 4,400
Find the two multiples of 100 either side: 4300 and 4400. Look at the digit to the right of the rounding place: 5 or more rounds up. 4364 rounds to 4400.
9. 94,400
Find the two multiples of 100 either side: 94300 and 94400. Look at the digit to the right of the rounding place: 5 or more rounds up. 94376 rounds to 94400.
10. 77,000
Find the two multiples of 100 either side: 76900 and 77000. Look at the digit to the right of the rounding place: 5 or more rounds up. 76955 rounds to 77000.
11. 68,000
Find the two multiples of 100 either side: 68000 and 68100. Look at the digit to the right of the rounding place: 5 or more rounds up. 68024 rounds to 68000.
12. 2,000
Find the two multiples of 1000 either side: 2000 and 3000. Look at the digit to the right of the rounding place: 5 or more rounds up. 2031 rounds to 2000.
Worked examples
Round 714 to the nearest 10.
- Find the two multiples of 10 either side: 710 and 720.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 714 rounds to 710.
- Answer: 710
Round 7,211 to the nearest 10.
- Find the two multiples of 10 either side: 7210 and 7220.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 7211 rounds to 7210.
- Answer: 7,210
Round 39,425 to the nearest 100.
- Find the two multiples of 100 either side: 39400 and 39500.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 39425 rounds to 39400.
- Answer: 39,400
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
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Frequently asked
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- Start with Working with Estimation in Context Common Errors: Common Mistakes, Working with Estimation in Context Common Errors: Visual Models, Rules and Methods in Estimation in Context Common Errors. Each one has its own free lesson, worksheet and quiz.
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- Move on to Introduction to Estimation in Context Common Errors, Key Vocabulary of Estimation in Context Common Errors, Rules and Methods in Estimation in Context Common Errors, Estimation in Context Common Errors in Examinations, which build directly on this idea.
Related resources
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