Free Grade 3 Rules and Methods in Estimation in Context Essentials Flashcards
Free Grade 3 flashcards for Rules and Methods in Estimation in Context Essentials: 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
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify rules and methods in estimation in context essentials
Identify rules and methods in estimation in context essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain rules and methods in estimation in context essentials
Explain rules and methods in estimation in context essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate rules and methods in estimation in context essentials
Calculate rules and methods in estimation in context essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare rules and methods in estimation in context essentials
Compare rules and methods in estimation in context essentials 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 Rules and Methods in Estimation in Context Essentials 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 518 to the nearest 10.[1]
- 2.Round 894 to the nearest 10.[1]
- 3.Round 401 to the nearest 10.[1]
- 4.Round 240 to the nearest 10.[1]
- 5.Round 4,437 to the nearest 100.[2]
- 6.Round 2,533 to the nearest 100.[2]
- 7.Round 2,039 to the nearest 10.[2]
- 8.Round 2,285 to the nearest 10.[2]
- 9.Round 838 to the nearest 100.[3]
- 10.Round 82,553 to the nearest 1,000.[3]
- 11.Round 3,319 to the nearest 100.[3]
- 12.Round 69,078 to the nearest 1,000.[3]
Show answers and working
1. 520
Find the two multiples of 10 either side: 510 and 520. Look at the digit to the right of the rounding place: 5 or more rounds up. 518 rounds to 520.
2. 890
Find the two multiples of 10 either side: 890 and 900. Look at the digit to the right of the rounding place: 5 or more rounds up. 894 rounds to 890.
3. 400
Find the two multiples of 10 either side: 400 and 410. Look at the digit to the right of the rounding place: 5 or more rounds up. 401 rounds to 400.
4. 240
Find the two multiples of 10 either side: 240 and 240. Look at the digit to the right of the rounding place: 5 or more rounds up. 240 rounds to 240.
5. 4,400
Find the two multiples of 100 either side: 4400 and 4500. Look at the digit to the right of the rounding place: 5 or more rounds up. 4437 rounds to 4400.
6. 2,500
Find the two multiples of 100 either side: 2500 and 2600. Look at the digit to the right of the rounding place: 5 or more rounds up. 2533 rounds to 2500.
7. 2,040
Find the two multiples of 10 either side: 2030 and 2040. Look at the digit to the right of the rounding place: 5 or more rounds up. 2039 rounds to 2040.
8. 2,290
Find the two multiples of 10 either side: 2280 and 2290. Look at the digit to the right of the rounding place: 5 or more rounds up. 2285 rounds to 2290.
9. 800
Find the two multiples of 100 either side: 800 and 900. Look at the digit to the right of the rounding place: 5 or more rounds up. 838 rounds to 800.
10. 83,000
Find the two multiples of 1000 either side: 82000 and 83000. Look at the digit to the right of the rounding place: 5 or more rounds up. 82553 rounds to 83000.
11. 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. 3319 rounds to 3300.
12. 69,000
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. 69078 rounds to 69000.
Worked examples
Round 409 to the nearest 10.
- Find the two multiples of 10 either side: 400 and 410.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 409 rounds to 410.
- Answer: 410
Round 7,984 to the nearest 10.
- Find the two multiples of 10 either side: 7980 and 7990.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 7984 rounds to 7980.
- Answer: 7,980
Round 22,957 to the nearest 1,000.
- Find the two multiples of 1000 either side: 22000 and 23000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 22957 rounds to 23000.
- Answer: 23,000
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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- Start with Key Vocabulary of Estimation in Context Essentials, Introduction to Estimation in Context Essentials, Working with Estimation. Each one has its own free lesson, worksheet and quiz.
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- Move on to Working with Estimation in Context Essentials, Estimation in Context Essentials in Examinations, Estimation in Context Techniques, Estimation in Context Word Problems, which build directly on this idea.
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