Free Grade 3 Working with Introducing Estimation Common Errors Lesson Plans
Free Grade 3 lesson plans 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
Core
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 670 to the nearest 10.[1]
- 2.Round 790 to the nearest 10.[1]
- 3.Round 823 to the nearest 10.[1]
- 4.Round 914 to the nearest 10.[1]
- 5.Round 7,817 to the nearest 100.[2]
- 6.Round 3,408 to the nearest 10.[2]
- 7.Round 6,030 to the nearest 10.[2]
- 8.Round 9,917 to the nearest 10.[2]
- 9.Round 80,500 to the nearest 100.[3]
- 10.Round 74,250 to the nearest 100.[3]
- 11.Round 38,890 to the nearest 100.[3]
- 12.Round 85,973 to the nearest 1,000.[3]
Show answers and working
1. 670
Find the two multiples of 10 either side: 670 and 670. Look at the digit to the right of the rounding place: 5 or more rounds up. 670 rounds to 670.
2. 790
Find the two multiples of 10 either side: 790 and 790. Look at the digit to the right of the rounding place: 5 or more rounds up. 790 rounds to 790.
3. 820
Find the two multiples of 10 either side: 820 and 830. Look at the digit to the right of the rounding place: 5 or more rounds up. 823 rounds to 820.
4. 910
Find the two multiples of 10 either side: 910 and 920. Look at the digit to the right of the rounding place: 5 or more rounds up. 914 rounds to 910.
5. 7,800
Find the two multiples of 100 either side: 7800 and 7900. Look at the digit to the right of the rounding place: 5 or more rounds up. 7817 rounds to 7800.
6. 3,410
Find the two multiples of 10 either side: 3400 and 3410. Look at the digit to the right of the rounding place: 5 or more rounds up. 3408 rounds to 3410.
7. 6,030
Find the two multiples of 10 either side: 6030 and 6030. Look at the digit to the right of the rounding place: 5 or more rounds up. 6030 rounds to 6030.
8. 9,920
Find the two multiples of 10 either side: 9910 and 9920. Look at the digit to the right of the rounding place: 5 or more rounds up. 9917 rounds to 9920.
9. 80,500
Find the two multiples of 100 either side: 80500 and 80500. Look at the digit to the right of the rounding place: 5 or more rounds up. 80500 rounds to 80500.
10. 74,300
Find the two multiples of 100 either side: 74200 and 74300. Look at the digit to the right of the rounding place: 5 or more rounds up. 74250 rounds to 74300.
11. 38,900
Find the two multiples of 100 either side: 38800 and 38900. Look at the digit to the right of the rounding place: 5 or more rounds up. 38890 rounds to 38900.
12. 86,000
Find the two multiples of 1000 either side: 85000 and 86000. Look at the digit to the right of the rounding place: 5 or more rounds up. 85973 rounds to 86000.
Worked examples
Round 249 to the nearest 10.
- Find the two multiples of 10 either side: 240 and 250.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 249 rounds to 250.
- Answer: 250
Round 9,993 to the nearest 10.
- Find the two multiples of 10 either side: 9990 and 10000.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 9993 rounds to 9990.
- Answer: 9,990
Round 89,553 to the nearest 100.
- Find the two multiples of 100 either side: 89500 and 89600.
- Look at the digit to the right of the rounding place: 5 or more rounds up.
- 89553 rounds to 89600.
- Answer: 89,600
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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