Free Grade 3 What is Working with Estimation in Context Common Errors Lessons
Free Grade 3 lessons for What is Working with Estimation in Context 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
Stretch
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain what is working with estimation in context common errors
Explain what is working with estimation in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate what is working with estimation in context common errors
Calculate what is working with estimation in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare what is working with estimation in context common errors
Compare what is working with estimation in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify what is working with estimation in context common errors
Justify what is working with estimation in context 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 What is Working with Estimation in Context 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 977 to the nearest 10.[1]
- 2.Round 838 to the nearest 10.[1]
- 3.Round 226 to the nearest 10.[1]
- 4.Round 153 to the nearest 10.[1]
- 5.Round 5,963 to the nearest 10.[2]
- 6.Round 6,327 to the nearest 100.[2]
- 7.Round 3,804 to the nearest 10.[2]
- 8.Round 7,090 to the nearest 10.[2]
- 9.Round 5,831 to the nearest 100.[3]
- 10.Round 99,151 to the nearest 1,000.[3]
- 11.Round 64,023 to the nearest 1,000.[3]
- 12.Round 31,798 to the nearest 1,000.[3]
Show answers and working
1. 980
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. 977 rounds to 980.
2. 840
Find the two multiples of 10 either side: 830 and 840. Look at the digit to the right of the rounding place: 5 or more rounds up. 838 rounds to 840.
3. 230
Find the two multiples of 10 either side: 220 and 230. Look at the digit to the right of the rounding place: 5 or more rounds up. 226 rounds to 230.
4. 150
Find the two multiples of 10 either side: 150 and 160. Look at the digit to the right of the rounding place: 5 or more rounds up. 153 rounds to 150.
5. 5,960
Find the two multiples of 10 either side: 5960 and 5970. Look at the digit to the right of the rounding place: 5 or more rounds up. 5963 rounds to 5960.
6. 6,300
Find the two multiples of 100 either side: 6300 and 6400. Look at the digit to the right of the rounding place: 5 or more rounds up. 6327 rounds to 6300.
7. 3,800
Find the two multiples of 10 either side: 3800 and 3810. Look at the digit to the right of the rounding place: 5 or more rounds up. 3804 rounds to 3800.
8. 7,090
Find the two multiples of 10 either side: 7090 and 7090. Look at the digit to the right of the rounding place: 5 or more rounds up. 7090 rounds to 7090.
9. 5,800
Find the two multiples of 100 either side: 5800 and 5900. Look at the digit to the right of the rounding place: 5 or more rounds up. 5831 rounds to 5800.
10. 99,000
Find the two multiples of 1000 either side: 99000 and 100000. Look at the digit to the right of the rounding place: 5 or more rounds up. 99151 rounds to 99000.
11. 64,000
Find the two multiples of 1000 either side: 64000 and 65000. Look at the digit to the right of the rounding place: 5 or more rounds up. 64023 rounds to 64000.
12. 32,000
Find the two multiples of 1000 either side: 31000 and 32000. Look at the digit to the right of the rounding place: 5 or more rounds up. 31798 rounds to 32000.
Worked examples
Round 617 to the nearest 10.
- Find the two multiples of 10 either side: 610 and 620.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 617 rounds to 620.
- Answer: 620
Round 7,008 to the nearest 100.
- Find the two multiples of 100 either side: 7000 and 7100.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 7008 rounds to 7000.
- Answer: 7,000
Round 85,143 to the nearest 1,000.
- Find the two multiples of 1000 either side: 85000 and 86000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 85143 rounds to 85000.
- Answer: 85,000
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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- What should a learner already know before this?
- Start with 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: Step-by-step Method, Working with Estimation in Context Common Errors: Worked Examples, Working with Estimation in Context Common Errors: Visual Models, Working with Estimation in Context Common Errors: Common Mistakes, which build directly on this idea.
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