Free Grade 3 Working with Estimation in Context Common Errors Lessons
Free Grade 3 lessons for 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
Higher
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify working with estimation in context common errors
Identify working with estimation in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain working with estimation in context common errors
Explain working with estimation in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with estimation in context common errors
Calculate working with estimation in context common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with estimation in context common errors
Compare 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 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 716 to the nearest 10.[1]
- 2.Round 686 to the nearest 10.[1]
- 3.Round 860 to the nearest 10.[1]
- 4.Round 908 to the nearest 10.[1]
- 5.Round 4,627 to the nearest 10.[2]
- 6.Round 4,164 to the nearest 100.[2]
- 7.Round 3,326 to the nearest 100.[2]
- 8.Round 4,039 to the nearest 100.[2]
- 9.Round 64,444 to the nearest 100.[3]
- 10.Round 81,663 to the nearest 100.[3]
- 11.Round 70,482 to the nearest 100.[3]
- 12.Round 31,390 to the nearest 1,000.[3]
Show answers and working
1. 720
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. 716 rounds to 720.
2. 690
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. 686 rounds to 690.
3. 860
Find the two multiples of 10 either side: 860 and 860. Look at the digit to the right of the rounding place: 5 or more rounds up. 860 rounds to 860.
4. 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.
5. 4,630
Find the two multiples of 10 either side: 4620 and 4630. Look at the digit to the right of the rounding place: 5 or more rounds up. 4627 rounds to 4630.
6. 4,200
Find the two multiples of 100 either side: 4100 and 4200. Look at the digit to the right of the rounding place: 5 or more rounds up. 4164 rounds to 4200.
7. 3,300
Find the two multiples of 100 either side: 3300 and 3400. Look at the digit to the right of the rounding place: 5 or more rounds up. 3326 rounds to 3300.
8. 4,000
Find the two multiples of 100 either side: 4000 and 4100. Look at the digit to the right of the rounding place: 5 or more rounds up. 4039 rounds to 4000.
9. 64,400
Find the two multiples of 100 either side: 64400 and 64500. Look at the digit to the right of the rounding place: 5 or more rounds up. 64444 rounds to 64400.
10. 81,700
Find the two multiples of 100 either side: 81600 and 81700. Look at the digit to the right of the rounding place: 5 or more rounds up. 81663 rounds to 81700.
11. 70,500
Find the two multiples of 100 either side: 70400 and 70500. Look at the digit to the right of the rounding place: 5 or more rounds up. 70482 rounds to 70500.
12. 31,000
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. 31390 rounds to 31000.
Worked examples
Round 445 to the nearest 10.
- Find the two multiples of 10 either side: 440 and 450.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 445 rounds to 450.
- Answer: 450
Round 8,413 to the nearest 10.
- Find the two multiples of 10 either side: 8410 and 8420.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 8413 rounds to 8410.
- Answer: 8,410
Round 64,407 to the nearest 1,000.
- 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.
- 64407 rounds to 64000.
- Answer: 64,000
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
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- What should a learner already know before this?
- Start with Rules and Methods in Estimation in Context Common Errors, Key Vocabulary of Estimation in Context Common Errors, Estimation in Context Word Problems. Each one has its own free lesson, worksheet and quiz.
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- 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 in Context Common Errors?
- Move on to Estimation in Context Common Errors in Examinations, Estimation in Context Essentials, Estimation in Context Techniques, Estimation in Context Word Problems, which build directly on this idea.
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