Free Grade 3 Working with Estimation in Context Common Errors: Common Mistakes Flashcards
Free Grade 3 flashcards 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
Higher
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 253 to the nearest 10.[1]
- 2.Round 922 to the nearest 10.[1]
- 3.Round 848 to the nearest 10.[1]
- 4.Round 800 to the nearest 10.[1]
- 5.Round 7,496 to the nearest 10.[2]
- 6.Round 5,897 to the nearest 10.[2]
- 7.Round 2,335 to the nearest 100.[2]
- 8.Round 7,705 to the nearest 100.[2]
- 9.Round 61,673 to the nearest 100.[3]
- 10.Round 99,865 to the nearest 1,000.[3]
- 11.Round 3,782 to the nearest 1,000.[3]
- 12.Round 48,500 to the nearest 100.[3]
Show answers and working
1. 250
Find the two multiples of 10 either side: 250 and 260. Look at the digit to the right of the rounding place: 5 or more rounds up. 253 rounds to 250.
2. 920
Find the two multiples of 10 either side: 920 and 930. Look at the digit to the right of the rounding place: 5 or more rounds up. 922 rounds to 920.
3. 850
Find the two multiples of 10 either side: 840 and 850. Look at the digit to the right of the rounding place: 5 or more rounds up. 848 rounds to 850.
4. 800
Find the two multiples of 10 either side: 800 and 800. Look at the digit to the right of the rounding place: 5 or more rounds up. 800 rounds to 800.
5. 7,500
Find the two multiples of 10 either side: 7490 and 7500. Look at the digit to the right of the rounding place: 5 or more rounds up. 7496 rounds to 7500.
6. 5,900
Find the two multiples of 10 either side: 5890 and 5900. Look at the digit to the right of the rounding place: 5 or more rounds up. 5897 rounds to 5900.
7. 2,300
Find the two multiples of 100 either side: 2300 and 2400. Look at the digit to the right of the rounding place: 5 or more rounds up. 2335 rounds to 2300.
8. 7,700
Find the two multiples of 100 either side: 7700 and 7800. Look at the digit to the right of the rounding place: 5 or more rounds up. 7705 rounds to 7700.
9. 61,700
Find the two multiples of 100 either side: 61600 and 61700. Look at the digit to the right of the rounding place: 5 or more rounds up. 61673 rounds to 61700.
10. 100,000
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. 99865 rounds to 100000.
11. 4,000
Find the two multiples of 1000 either side: 3000 and 4000. Look at the digit to the right of the rounding place: 5 or more rounds up. 3782 rounds to 4000.
12. 48,500
Find the two multiples of 100 either side: 48500 and 48500. Look at the digit to the right of the rounding place: 5 or more rounds up. 48500 rounds to 48500.
Worked examples
Round 329 to the nearest 10.
- Find the two multiples of 10 either side: 320 and 330.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 329 rounds to 330.
- Answer: 330
Round 259 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.
- 259 rounds to 300.
- Answer: 300
Round 71,474 to the nearest 100.
- Find the two multiples of 100 either side: 71400 and 71500.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 71474 rounds to 71500.
- Answer: 71,500
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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