Free Grade 3 Working with Estimation in Context Common Errors: Common Mistakes Lesson Plans
Free Grade 3 lesson plans 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
30 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 767 to the nearest 10.[1]
- 2.Round 310 to the nearest 10.[1]
- 3.Round 471 to the nearest 10.[1]
- 4.Round 365 to the nearest 10.[1]
- 5.Round 6,517 to the nearest 100.[2]
- 6.Round 8,524 to the nearest 10.[2]
- 7.Round 4,503 to the nearest 100.[2]
- 8.Round 5,755 to the nearest 10.[2]
- 9.Round 2,024 to the nearest 100.[3]
- 10.Round 16,841 to the nearest 1,000.[3]
- 11.Round 79,752 to the nearest 100.[3]
- 12.Round 16,435 to the nearest 1,000.[3]
Show answers and working
1. 770
Find the two multiples of 10 either side: 760 and 770. Look at the digit to the right of the rounding place: 5 or more rounds up. 767 rounds to 770.
2. 310
Find the two multiples of 10 either side: 310 and 310. Look at the digit to the right of the rounding place: 5 or more rounds up. 310 rounds to 310.
3. 470
Find the two multiples of 10 either side: 470 and 480. Look at the digit to the right of the rounding place: 5 or more rounds up. 471 rounds to 470.
4. 370
Find the two multiples of 10 either side: 360 and 370. Look at the digit to the right of the rounding place: 5 or more rounds up. 365 rounds to 370.
5. 6,500
Find the two multiples of 100 either side: 6500 and 6600. Look at the digit to the right of the rounding place: 5 or more rounds up. 6517 rounds to 6500.
6. 8,520
Find the two multiples of 10 either side: 8520 and 8530. Look at the digit to the right of the rounding place: 5 or more rounds up. 8524 rounds to 8520.
7. 4,500
Find the two multiples of 100 either side: 4500 and 4600. Look at the digit to the right of the rounding place: 5 or more rounds up. 4503 rounds to 4500.
8. 5,760
Find the two multiples of 10 either side: 5750 and 5760. Look at the digit to the right of the rounding place: 5 or more rounds up. 5755 rounds to 5760.
9. 2,000
Find the two multiples of 100 either side: 2000 and 2100. Look at the digit to the right of the rounding place: 5 or more rounds up. 2024 rounds to 2000.
10. 17,000
Find the two multiples of 1000 either side: 16000 and 17000. Look at the digit to the right of the rounding place: 5 or more rounds up. 16841 rounds to 17000.
11. 79,800
Find the two multiples of 100 either side: 79700 and 79800. Look at the digit to the right of the rounding place: 5 or more rounds up. 79752 rounds to 79800.
12. 16,000
Find the two multiples of 1000 either side: 16000 and 17000. Look at the digit to the right of the rounding place: 5 or more rounds up. 16435 rounds to 16000.
Worked examples
Round 688 to the nearest 10.
- Find the two multiples of 10 either side: 680 and 690.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 688 rounds to 690.
- Answer: 690
Round 262 to the nearest 100.
- Find the two multiples of 100 either side: 200 and 300.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 262 rounds to 300.
- Answer: 300
Round 66,646 to the nearest 1,000.
- 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.
- 66646 rounds to 67000.
- Answer: 67,000
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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- 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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- 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.
Related resources
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