Free Grade 3 Rules and Methods in Introducing Sampling Common Errors Flashcards
Free Grade 3 flashcards for Rules and Methods in Introducing Sampling Common Errors: 12 real questions with a full answer key and worked solutions. Charts show data visually. In a pie chart, each category's angle is its fraction of the total multiplied by 360°.
Free
Foundation
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain rules and methods in introducing sampling common errors
Explain rules and methods in introducing sampling common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate rules and methods in introducing sampling common errors
Calculate rules and methods in introducing sampling common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare rules and methods in introducing sampling common errors
Compare rules and methods in introducing sampling common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify rules and methods in introducing sampling common errors
Justify rules and methods in introducing sampling 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 Rules and Methods in Introducing Sampling Common Errors works
Charts show data visually. In a pie chart, each category's angle is its fraction of the total multiplied by 360°.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.In a survey: Red 14, Blue 6, Green 5, Yellow 12. In a pie chart, what angle does Blue get?[1]
- 2.In a survey: Red 2, Blue 10, Green 9, Yellow 8. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 9, Blue 11, Green 13, Yellow 4. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 7, Blue 6, Green 5, Yellow 7. In a pie chart, what angle does Blue get?[1]
- 5.In a survey: Red 10, Blue 4, Green 4, Yellow 9. In a pie chart, what angle does Green get?[2]
- 6.In a survey: Red 4, Blue 14, Green 13, Yellow 6. In a pie chart, what angle does Blue get?[2]
- 7.In a survey: Red 15, Blue 4, Green 2, Yellow 6. In a pie chart, what angle does Blue get?[2]
- 8.In a survey: Red 14, Blue 14, Green 5, Yellow 5. In a pie chart, what angle does Blue get?[2]
- 9.In a survey: Red 2, Blue 2, Green 12, Yellow 12. In a pie chart, what angle does Red get?[3]
- 10.In a survey: Red 11, Blue 7, Green 13, Yellow 8. In a pie chart, what angle does Red get?[3]
- 11.In a survey: Red 5, Blue 2, Green 14, Yellow 12. In a pie chart, what angle does Blue get?[3]
- 12.In a survey: Red 14, Blue 5, Green 5, Yellow 10. In a pie chart, what angle does Yellow get?[3]
Show answers and working
1. 58.4°
Total = 37. Blue fraction = 6/37. 6/37 × 360° = 58.4°.
2. 24.8°
Total = 29. Red fraction = 2/29. 2/29 × 360° = 24.8°.
3. 126.5°
Total = 37. Green fraction = 13/37. 13/37 × 360° = 126.5°.
4. 86.4°
Total = 25. Blue fraction = 6/25. 6/25 × 360° = 86.4°.
5. 53.3°
Total = 27. Green fraction = 4/27. 4/27 × 360° = 53.3°.
6. 136.2°
Total = 37. Blue fraction = 14/37. 14/37 × 360° = 136.2°.
7. 53.3°
Total = 27. Blue fraction = 4/27. 4/27 × 360° = 53.3°.
8. 132.6°
Total = 38. Blue fraction = 14/38. 14/38 × 360° = 132.6°.
9. 25.7°
Total = 28. Red fraction = 2/28. 2/28 × 360° = 25.7°.
10. 101.5°
Total = 39. Red fraction = 11/39. 11/39 × 360° = 101.5°.
11. 21.8°
Total = 33. Blue fraction = 2/33. 2/33 × 360° = 21.8°.
12. 105.9°
Total = 34. Yellow fraction = 10/34. 10/34 × 360° = 105.9°.
Worked examples
In a survey: Red 3, Blue 4, Green 11, Yellow 13. In a pie chart, what angle does Red get?
- Total = 31.
- Red fraction = 3/31.
- 3/31 × 360° = 34.8°.
- Answer: 34.8°
In a survey: Red 6, Blue 7, Green 7, Yellow 10. In a pie chart, what angle does Red get?
- Total = 30.
- Red fraction = 6/30.
- 6/30 × 360° = 72°.
- Answer: 72°
In a survey: Red 6, Blue 8, Green 2, Yellow 4. In a pie chart, what angle does Yellow get?
- Total = 20.
- Yellow fraction = 4/20.
- 4/20 × 360° = 72°.
- Answer: 72°
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Uses 100 instead of 360 for pie-chart angles.
Correction: A full circle is 360°.
Forgets to find the total first.
Correction: Add all frequencies before working out fractions.
Teacher tips
- · Have pupils check that all angles add to 360°.
Parent tips
- · Look at charts in the news and ask what they show.
Real-life applications
- · News infographics, survey results.
Assessment objectives
How mastery is evidenced, and which standards it maps to.
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- Start with Key Vocabulary of Introducing Sampling Common Errors, Introduction to Introducing Sampling Common Errors, Introducing Sampling Word Problems. Each one has its own free lesson, worksheet and quiz.
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- Move on to Working with Introducing Sampling Common Errors, Introducing Sampling Common Errors in Examinations, Introducing Sampling Essentials, Introducing Sampling Techniques, which build directly on this idea.
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