Free Grade 3 Working with Sampling Common Errors in Examinations Flashcards
Free Grade 3 flashcards for Working with Sampling Common Errors in Examinations: 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
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with sampling common errors in examinations
Explain working with sampling common errors in examinations accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with sampling common errors in examinations
Calculate working with sampling common errors in examinations accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with sampling common errors in examinations
Compare working with sampling common errors in examinations accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with sampling common errors in examinations
Justify working with sampling common errors in examinations 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 Sampling Common Errors in Examinations 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 2, Blue 6, Green 10, Yellow 6. In a pie chart, what angle does Blue get?[1]
- 2.In a survey: Red 7, Blue 3, Green 6, Yellow 4. In a pie chart, what angle does Blue get?[1]
- 3.In a survey: Red 6, Blue 8, Green 2, Yellow 14. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 2, Blue 9, Green 13, Yellow 7. In a pie chart, what angle does Yellow get?[1]
- 5.In a survey: Red 9, Blue 3, Green 10, Yellow 5. In a pie chart, what angle does Green get?[2]
- 6.In a survey: Red 15, Blue 13, Green 12, Yellow 2. In a pie chart, what angle does Blue get?[2]
- 7.In a survey: Red 5, Blue 11, Green 14, Yellow 4. In a pie chart, what angle does Yellow get?[2]
- 8.In a survey: Red 13, Blue 6, Green 2, Yellow 4. In a pie chart, what angle does Red get?[2]
- 9.In a survey: Red 15, Blue 9, Green 2, Yellow 15. In a pie chart, what angle does Red get?[3]
- 10.In a survey: Red 11, Blue 15, Green 14, Yellow 12. In a pie chart, what angle does Yellow get?[3]
- 11.In a survey: Red 14, Blue 12, Green 15, Yellow 5. In a pie chart, what angle does Red get?[3]
- 12.In a survey: Red 12, Blue 2, Green 12, Yellow 13. In a pie chart, what angle does Green get?[3]
Show answers and working
1. 90°
Total = 24. Blue fraction = 6/24. 6/24 × 360° = 90°.
2. 54°
Total = 20. Blue fraction = 3/20. 3/20 × 360° = 54°.
3. 24°
Total = 30. Green fraction = 2/30. 2/30 × 360° = 24°.
4. 81.3°
Total = 31. Yellow fraction = 7/31. 7/31 × 360° = 81.3°.
5. 133.3°
Total = 27. Green fraction = 10/27. 10/27 × 360° = 133.3°.
6. 111.4°
Total = 42. Blue fraction = 13/42. 13/42 × 360° = 111.4°.
7. 42.4°
Total = 34. Yellow fraction = 4/34. 4/34 × 360° = 42.4°.
8. 187.2°
Total = 25. Red fraction = 13/25. 13/25 × 360° = 187.2°.
9. 131.7°
Total = 41. Red fraction = 15/41. 15/41 × 360° = 131.7°.
10. 83.1°
Total = 52. Yellow fraction = 12/52. 12/52 × 360° = 83.1°.
11. 109.6°
Total = 46. Red fraction = 14/46. 14/46 × 360° = 109.6°.
12. 110.8°
Total = 39. Green fraction = 12/39. 12/39 × 360° = 110.8°.
Worked examples
In a survey: Red 6, Blue 6, Green 7, Yellow 11. In a pie chart, what angle does Green get?
- Total = 30.
- Green fraction = 7/30.
- 7/30 × 360° = 84°.
- Answer: 84°
In a survey: Red 12, Blue 8, Green 2, Yellow 9. In a pie chart, what angle does Green get?
- Total = 31.
- Green fraction = 2/31.
- 2/31 × 360° = 23.2°.
- Answer: 23.2°
In a survey: Red 5, Blue 14, Green 6, Yellow 4. In a pie chart, what angle does Yellow get?
- Total = 29.
- Yellow fraction = 4/29.
- 4/29 × 360° = 49.7°.
- Answer: 49.7°
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
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- Start with Working with Working with Sampling Common Errors, Rules and Methods in Working with Sampling Common Errors, Working with Sampling Word Problems. Each one has its own free lesson, worksheet and quiz.
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- Move on to Working with Sampling Essentials, Working with Sampling Techniques, Working with Sampling Word Problems, which build directly on this idea.
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