Free Grade 3 Working with Estimation in Context Common Errors: Real-life Applications Lesson Plans
Free Grade 3 lesson plans 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
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: 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 375 to the nearest 10.[1]
- 2.Round 725 to the nearest 10.[1]
- 3.Round 117 to the nearest 10.[1]
- 4.Round 166 to the nearest 10.[1]
- 5.Round 2,824 to the nearest 100.[2]
- 6.Round 5,837 to the nearest 100.[2]
- 7.Round 9,421 to the nearest 10.[2]
- 8.Round 3,454 to the nearest 100.[2]
- 9.Round 20,887 to the nearest 1,000.[3]
- 10.Round 84,253 to the nearest 1,000.[3]
- 11.Round 46,164 to the nearest 1,000.[3]
- 12.Round 30,368 to the nearest 1,000.[3]
Show answers and working
1. 380
Find the two multiples of 10 either side: 370 and 380. Look at the digit to the right of the rounding place: 5 or more rounds up. 375 rounds to 380.
2. 730
Find the two multiples of 10 either side: 720 and 730. Look at the digit to the right of the rounding place: 5 or more rounds up. 725 rounds to 730.
3. 120
Find the two multiples of 10 either side: 110 and 120. Look at the digit to the right of the rounding place: 5 or more rounds up. 117 rounds to 120.
4. 170
Find the two multiples of 10 either side: 160 and 170. Look at the digit to the right of the rounding place: 5 or more rounds up. 166 rounds to 170.
5. 2,800
Find the two multiples of 100 either side: 2800 and 2900. Look at the digit to the right of the rounding place: 5 or more rounds up. 2824 rounds to 2800.
6. 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. 5837 rounds to 5800.
7. 9,420
Find the two multiples of 10 either side: 9420 and 9430. Look at the digit to the right of the rounding place: 5 or more rounds up. 9421 rounds to 9420.
8. 3,500
Find the two multiples of 100 either side: 3400 and 3500. Look at the digit to the right of the rounding place: 5 or more rounds up. 3454 rounds to 3500.
9. 21,000
Find the two multiples of 1000 either side: 20000 and 21000. Look at the digit to the right of the rounding place: 5 or more rounds up. 20887 rounds to 21000.
10. 84,000
Find the two multiples of 1000 either side: 84000 and 85000. Look at the digit to the right of the rounding place: 5 or more rounds up. 84253 rounds to 84000.
11. 46,000
Find the two multiples of 1000 either side: 46000 and 47000. Look at the digit to the right of the rounding place: 5 or more rounds up. 46164 rounds to 46000.
12. 30,000
Find the two multiples of 1000 either side: 30000 and 31000. Look at the digit to the right of the rounding place: 5 or more rounds up. 30368 rounds to 30000.
Worked examples
Round 127 to the nearest 10.
- Find the two multiples of 10 either side: 120 and 130.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 127 rounds to 130.
- Answer: 130
Round 5,508 to the nearest 100.
- Find the two multiples of 100 either side: 5500 and 5600.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 5508 rounds to 5500.
- Answer: 5,500
Round 13,690 to the nearest 100.
- Find the two multiples of 100 either side: 13600 and 13700.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 13690 rounds to 13700.
- Answer: 13,700
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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Related resources
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