Free Grade 3 Estimation Lesson Plans
Free Grade 3 lesson plans 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
30 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 924 to the nearest 10.[1]
- 2.Round 372 to the nearest 10.[1]
- 3.Round 525 to the nearest 10.[1]
- 4.Round 795 to the nearest 10.[1]
- 5.Round 6,440 to the nearest 100.[2]
- 6.Round 679 to the nearest 100.[2]
- 7.Round 5,840 to the nearest 100.[2]
- 8.Round 1,488 to the nearest 10.[2]
- 9.Round 75,047 to the nearest 1,000.[3]
- 10.Round 34,785 to the nearest 100.[3]
- 11.Round 65,601 to the nearest 1,000.[3]
- 12.Round 31,091 to the nearest 1,000.[3]
Show answers and working
1. 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. 924 rounds to 920.
2. 370
Find the two multiples of 10 either side: 370 and 380. Look at the digit to the right of the rounding place: 5 or more rounds up. 372 rounds to 370.
3. 530
Find the two multiples of 10 either side: 520 and 530. Look at the digit to the right of the rounding place: 5 or more rounds up. 525 rounds to 530.
4. 800
Find the two multiples of 10 either side: 790 and 800. Look at the digit to the right of the rounding place: 5 or more rounds up. 795 rounds to 800.
5. 6,400
Find the two multiples of 100 either side: 6400 and 6500. Look at the digit to the right of the rounding place: 5 or more rounds up. 6440 rounds to 6400.
6. 700
Find the two multiples of 100 either side: 600 and 700. Look at the digit to the right of the rounding place: 5 or more rounds up. 679 rounds to 700.
7. 5,800
Find the two multiples of 100 either side: 5800 and 5900. Look at the digit to the right of the rounding place: 5 or more rounds up. 5840 rounds to 5800.
8. 1,490
Find the two multiples of 10 either side: 1480 and 1490. Look at the digit to the right of the rounding place: 5 or more rounds up. 1488 rounds to 1490.
9. 75,000
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. 75047 rounds to 75000.
10. 34,800
Find the two multiples of 100 either side: 34700 and 34800. Look at the digit to the right of the rounding place: 5 or more rounds up. 34785 rounds to 34800.
11. 66,000
Find the two multiples of 1000 either side: 65000 and 66000. Look at the digit to the right of the rounding place: 5 or more rounds up. 65601 rounds to 66000.
12. 31,000
Find the two multiples of 1000 either side: 31000 and 32000. Look at the digit to the right of the rounding place: 5 or more rounds up. 31091 rounds to 31000.
Worked examples
Round 535 to the nearest 10.
- Find the two multiples of 10 either side: 530 and 540.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 535 rounds to 540.
- Answer: 540
Round 699 to the nearest 10.
- Find the two multiples of 10 either side: 690 and 700.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 699 rounds to 700.
- Answer: 700
Round 67,886 to the nearest 1,000.
- Find the two multiples of 1000 either side: 67000 and 68000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 67886 rounds to 68000.
- Answer: 68,000
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 plan really free?
- Yes. Every lesson plans 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 plan 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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