Free Grade 3 Introducing Estimation Common Errors Flashcards
Free Grade 3 flashcards for 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
Higher
35 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introducing estimation common errors
Explain introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing estimation common errors
Calculate introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing estimation common errors
Compare introducing estimation common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introducing estimation common errors
Justify 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 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 936 to the nearest 10.[1]
- 2.Round 861 to the nearest 10.[1]
- 3.Round 446 to the nearest 10.[1]
- 4.Round 780 to the nearest 10.[1]
- 5.Round 7,419 to the nearest 10.[2]
- 6.Round 795 to the nearest 100.[2]
- 7.Round 1,837 to the nearest 10.[2]
- 8.Round 9,961 to the nearest 100.[2]
- 9.Round 70,813 to the nearest 1,000.[3]
- 10.Round 33,905 to the nearest 100.[3]
- 11.Round 21,700 to the nearest 1,000.[3]
- 12.Round 69,725 to the nearest 1,000.[3]
Show answers and working
1. 940
Find the two multiples of 10 either side: 930 and 940. Look at the digit to the right of the rounding place: 5 or more rounds up. 936 rounds to 940.
2. 860
Find the two multiples of 10 either side: 860 and 870. Look at the digit to the right of the rounding place: 5 or more rounds up. 861 rounds to 860.
3. 450
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. 446 rounds to 450.
4. 780
Find the two multiples of 10 either side: 780 and 780. Look at the digit to the right of the rounding place: 5 or more rounds up. 780 rounds to 780.
5. 7,420
Find the two multiples of 10 either side: 7410 and 7420. Look at the digit to the right of the rounding place: 5 or more rounds up. 7419 rounds to 7420.
6. 800
Find the two multiples of 100 either side: 700 and 800. Look at the digit to the right of the rounding place: 5 or more rounds up. 795 rounds to 800.
7. 1,840
Find the two multiples of 10 either side: 1830 and 1840. Look at the digit to the right of the rounding place: 5 or more rounds up. 1837 rounds to 1840.
8. 10,000
Find the two multiples of 100 either side: 9900 and 10000. Look at the digit to the right of the rounding place: 5 or more rounds up. 9961 rounds to 10000.
9. 71,000
Find the two multiples of 1000 either side: 70000 and 71000. Look at the digit to the right of the rounding place: 5 or more rounds up. 70813 rounds to 71000.
10. 33,900
Find the two multiples of 100 either side: 33900 and 34000. Look at the digit to the right of the rounding place: 5 or more rounds up. 33905 rounds to 33900.
11. 22,000
Find the two multiples of 1000 either side: 21000 and 22000. Look at the digit to the right of the rounding place: 5 or more rounds up. 21700 rounds to 22000.
12. 70,000
Find the two multiples of 1000 either side: 69000 and 70000. Look at the digit to the right of the rounding place: 5 or more rounds up. 69725 rounds to 70000.
Worked examples
Round 647 to the nearest 10.
- Find the two multiples of 10 either side: 640 and 650.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 647 rounds to 650.
- Answer: 650
Round 4,804 to the nearest 100.
- Find the two multiples of 100 either side: 4800 and 4900.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 4804 rounds to 4800.
- Answer: 4,800
Round 35,692 to the nearest 1,000.
- Find the two multiples of 1000 either side: 35000 and 36000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 35692 rounds to 36000.
- Answer: 36,000
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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Frequently asked
- Is this Grade 3 Introducing Estimation Common Errors flashcards really free?
- Yes. Every flashcards on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Introducing Estimation Word Problems, Introducing Estimation Techniques, Rounding. Each one has its own free lesson, worksheet and quiz.
- How is the flashcards sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introducing Estimation Common Errors?
- Move on to Working with Estimation, Estimation in Context, which build directly on this idea.
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