Free Grade 3 Working with Introducing Estimation Common Errors Flashcards
Free Grade 3 flashcards for Working with Introducing Estimation 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
Foundation
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with introducing estimation common errors
Explain working with introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing estimation common errors
Calculate working with introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing estimation common errors
Compare working with introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with introducing estimation common errors
Justify working with introducing estimation 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 Introducing Estimation 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 157 to the nearest 10.[1]
- 2.Round 495 to the nearest 10.[1]
- 3.Round 130 to the nearest 10.[1]
- 4.Round 148 to the nearest 10.[1]
- 5.Round 6,232 to the nearest 10.[2]
- 6.Round 7,667 to the nearest 100.[2]
- 7.Round 5,478 to the nearest 100.[2]
- 8.Round 9,958 to the nearest 10.[2]
- 9.Round 56,084 to the nearest 1,000.[3]
- 10.Round 75,603 to the nearest 1,000.[3]
- 11.Round 39,614 to the nearest 100.[3]
- 12.Round 53,868 to the nearest 1,000.[3]
Show answers and working
1. 160
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. 157 rounds to 160.
2. 500
Find the two multiples of 10 either side: 490 and 500. Look at the digit to the right of the rounding place: 5 or more rounds up. 495 rounds to 500.
3. 130
Find the two multiples of 10 either side: 130 and 130. Look at the digit to the right of the rounding place: 5 or more rounds up. 130 rounds to 130.
4. 150
Find the two multiples of 10 either side: 140 and 150. Look at the digit to the right of the rounding place: 5 or more rounds up. 148 rounds to 150.
5. 6,230
Find the two multiples of 10 either side: 6230 and 6240. Look at the digit to the right of the rounding place: 5 or more rounds up. 6232 rounds to 6230.
6. 7,700
Find the two multiples of 100 either side: 7600 and 7700. Look at the digit to the right of the rounding place: 5 or more rounds up. 7667 rounds to 7700.
7. 5,500
Find the two multiples of 100 either side: 5400 and 5500. Look at the digit to the right of the rounding place: 5 or more rounds up. 5478 rounds to 5500.
8. 9,960
Find the two multiples of 10 either side: 9950 and 9960. Look at the digit to the right of the rounding place: 5 or more rounds up. 9958 rounds to 9960.
9. 56,000
Find the two multiples of 1000 either side: 56000 and 57000. Look at the digit to the right of the rounding place: 5 or more rounds up. 56084 rounds to 56000.
10. 76,000
Find the two multiples of 1000 either side: 75000 and 76000. Look at the digit to the right of the rounding place: 5 or more rounds up. 75603 rounds to 76000.
11. 39,600
Find the two multiples of 100 either side: 39600 and 39700. Look at the digit to the right of the rounding place: 5 or more rounds up. 39614 rounds to 39600.
12. 54,000
Find the two multiples of 1000 either side: 53000 and 54000. Look at the digit to the right of the rounding place: 5 or more rounds up. 53868 rounds to 54000.
Worked examples
Round 612 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.
- 612 rounds to 610.
- Answer: 610
Round 4,160 to the nearest 100.
- 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.
- 4160 rounds to 4200.
- Answer: 4,200
Round 20,959 to the nearest 1,000.
- 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.
- 20959 rounds to 21000.
- Answer: 21,000
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 Introducing Estimation Common Errors, Key Vocabulary of Introducing Estimation Common Errors, Introducing Estimation 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 Introducing Estimation Common Errors?
- Move on to Introducing Estimation Common Errors in Examinations, Introducing Estimation Essentials, Introducing Estimation Techniques, Introducing Estimation Word Problems, which build directly on this idea.
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