Free Grade 3 Rules and Methods in Introducing Sampling Common Errors: Common Mistakes Flashcards
Free Grade 3 flashcards for Rules and Methods in Introducing Sampling Common Errors: Common Mistakes: 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
Higher
15 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: common mistakes
Explain rules and methods in introducing sampling common errors: common mistakes accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate rules and methods in introducing sampling common errors: common mistakes
Calculate rules and methods in introducing sampling common errors: common mistakes accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare rules and methods in introducing sampling common errors: common mistakes
Compare rules and methods in introducing sampling common errors: common mistakes accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify rules and methods in introducing sampling common errors: common mistakes
Justify rules and methods in introducing sampling common errors: common mistakes 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: Common Mistakes 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 10, Yellow 5. In a pie chart, what angle does Blue get?[1]
- 2.In a survey: Red 11, Blue 9, Green 7, Yellow 4. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 14, Blue 7, Green 3, Yellow 11. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 15, Blue 5, Green 6, Yellow 3. In a pie chart, what angle does Green get?[1]
- 5.In a survey: Red 4, Blue 13, Green 4, Yellow 2. In a pie chart, what angle does Green get?[2]
- 6.In a survey: Red 10, Blue 5, Green 9, Yellow 8. In a pie chart, what angle does Blue get?[2]
- 7.In a survey: Red 6, Blue 3, Green 5, Yellow 4. In a pie chart, what angle does Yellow get?[2]
- 8.In a survey: Red 3, Blue 10, Green 9, Yellow 6. In a pie chart, what angle does Blue get?[2]
- 9.In a survey: Red 5, Blue 10, Green 5, Yellow 10. In a pie chart, what angle does Green get?[3]
- 10.In a survey: Red 5, Blue 5, Green 3, Yellow 13. In a pie chart, what angle does Green get?[3]
- 11.In a survey: Red 14, Blue 15, Green 2, Yellow 10. In a pie chart, what angle does Yellow get?[3]
- 12.In a survey: Red 10, Blue 7, Green 9, Yellow 14. In a pie chart, what angle does Blue get?[3]
Show answers and working
1. 61.7°
Total = 35. Blue fraction = 6/35. 6/35 × 360° = 61.7°.
2. 127.7°
Total = 31. Red fraction = 11/31. 11/31 × 360° = 127.7°.
3. 30.9°
Total = 35. Green fraction = 3/35. 3/35 × 360° = 30.9°.
4. 74.5°
Total = 29. Green fraction = 6/29. 6/29 × 360° = 74.5°.
5. 62.6°
Total = 23. Green fraction = 4/23. 4/23 × 360° = 62.6°.
6. 56.3°
Total = 32. Blue fraction = 5/32. 5/32 × 360° = 56.3°.
7. 80°
Total = 18. Yellow fraction = 4/18. 4/18 × 360° = 80°.
8. 128.6°
Total = 28. Blue fraction = 10/28. 10/28 × 360° = 128.6°.
9. 60°
Total = 30. Green fraction = 5/30. 5/30 × 360° = 60°.
10. 41.5°
Total = 26. Green fraction = 3/26. 3/26 × 360° = 41.5°.
11. 87.8°
Total = 41. Yellow fraction = 10/41. 10/41 × 360° = 87.8°.
12. 63°
Total = 40. Blue fraction = 7/40. 7/40 × 360° = 63°.
Worked examples
In a survey: Red 8, Blue 14, Green 6, Yellow 5. In a pie chart, what angle does Blue get?
- Total = 33.
- Blue fraction = 14/33.
- 14/33 × 360° = 152.7°.
- Answer: 152.7°
In a survey: Red 15, Blue 6, Green 11, Yellow 14. In a pie chart, what angle does Blue get?
- Total = 46.
- Blue fraction = 6/46.
- 6/46 × 360° = 47°.
- Answer: 47°
In a survey: Red 9, Blue 6, Green 7, Yellow 3. In a pie chart, what angle does Blue get?
- Total = 25.
- Blue fraction = 6/25.
- 6/25 × 360° = 86.4°.
- Answer: 86.4°
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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