Free Grade 3 Estimation Lessons
Free Grade 3 lessons for Estimation: 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.
- UnderstandExplain estimation
Explain estimation accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate estimation
Calculate estimation accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare estimation
Compare estimation accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify estimation
Justify estimation 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 Estimation 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 593 to the nearest 10.[1]
- 2.Round 509 to the nearest 10.[1]
- 3.Round 897 to the nearest 10.[1]
- 4.Round 761 to the nearest 10.[1]
- 5.Round 4,175 to the nearest 10.[2]
- 6.Round 2,199 to the nearest 100.[2]
- 7.Round 7,454 to the nearest 10.[2]
- 8.Round 1,373 to the nearest 10.[2]
- 9.Round 16,424 to the nearest 1,000.[3]
- 10.Round 33,866 to the nearest 100.[3]
- 11.Round 66,614 to the nearest 100.[3]
- 12.Round 17,843 to the nearest 100.[3]
Show answers and working
1. 590
Find the two multiples of 10 either side: 590 and 600. Look at the digit to the right of the rounding place: 5 or more rounds up. 593 rounds to 590.
2. 510
Find the two multiples of 10 either side: 500 and 510. Look at the digit to the right of the rounding place: 5 or more rounds up. 509 rounds to 510.
3. 900
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. 897 rounds to 900.
4. 760
Find the two multiples of 10 either side: 760 and 770. Look at the digit to the right of the rounding place: 5 or more rounds up. 761 rounds to 760.
5. 4,180
Find the two multiples of 10 either side: 4170 and 4180. Look at the digit to the right of the rounding place: 5 or more rounds up. 4175 rounds to 4180.
6. 2,200
Find the two multiples of 100 either side: 2100 and 2200. Look at the digit to the right of the rounding place: 5 or more rounds up. 2199 rounds to 2200.
7. 7,450
Find the two multiples of 10 either side: 7450 and 7460. Look at the digit to the right of the rounding place: 5 or more rounds up. 7454 rounds to 7450.
8. 1,370
Find the two multiples of 10 either side: 1370 and 1380. Look at the digit to the right of the rounding place: 5 or more rounds up. 1373 rounds to 1370.
9. 16,000
Find the two multiples of 1000 either side: 16000 and 17000. Look at the digit to the right of the rounding place: 5 or more rounds up. 16424 rounds to 16000.
10. 33,900
Find the two multiples of 100 either side: 33800 and 33900. Look at the digit to the right of the rounding place: 5 or more rounds up. 33866 rounds to 33900.
11. 66,600
Find the two multiples of 100 either side: 66600 and 66700. Look at the digit to the right of the rounding place: 5 or more rounds up. 66614 rounds to 66600.
12. 17,800
Find the two multiples of 100 either side: 17800 and 17900. Look at the digit to the right of the rounding place: 5 or more rounds up. 17843 rounds to 17800.
Worked examples
Round 123 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.
- 123 rounds to 120.
- Answer: 120
Round 9,198 to the nearest 100.
- Find the two multiples of 100 either side: 9100 and 9200.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 9198 rounds to 9200.
- Answer: 9,200
Round 96,035 to the nearest 1,000.
- Find the two multiples of 1000 either side: 96000 and 97000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 96035 rounds to 96000.
- Answer: 96,000
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.
Every free resource for Estimation
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Frequently asked
- Is this Grade 3 Estimation lesson really free?
- Yes. Every lessons 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 Rounding, Word Form. Each one has its own free lesson, worksheet and quiz.
- How is the lesson 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 Estimation?
- Move on to Mental Math, Whole Numbers in Real Life, Counting, Number Recognition, which build directly on this idea.
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