Free Grade 3 Introduction to Introducing Sampling Techniques Flashcards
Free Grade 3 flashcards for Introduction to Introducing Sampling Techniques: 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
35 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introduction to introducing sampling techniques
Explain introduction to introducing sampling techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introduction to introducing sampling techniques
Calculate introduction to introducing sampling techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introduction to introducing sampling techniques
Compare introduction to introducing sampling techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introduction to introducing sampling techniques
Justify introduction to introducing sampling techniques 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 Introduction to Introducing Sampling Techniques 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 7, Blue 10, Green 2, Yellow 3. In a pie chart, what angle does Blue get?[1]
- 2.In a survey: Red 11, Blue 4, Green 9, Yellow 7. In a pie chart, what angle does Blue get?[1]
- 3.In a survey: Red 11, Blue 13, Green 9, Yellow 10. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 10, Blue 12, Green 10, Yellow 11. In a pie chart, what angle does Red get?[1]
- 5.In a survey: Red 15, Blue 4, Green 5, Yellow 12. In a pie chart, what angle does Yellow get?[2]
- 6.In a survey: Red 6, Blue 13, Green 13, Yellow 13. In a pie chart, what angle does Red get?[2]
- 7.In a survey: Red 9, Blue 3, Green 15, Yellow 3. In a pie chart, what angle does Green get?[2]
- 8.In a survey: Red 11, Blue 7, Green 4, Yellow 11. In a pie chart, what angle does Yellow get?[2]
- 9.In a survey: Red 14, Blue 15, Green 12, Yellow 3. In a pie chart, what angle does Blue get?[3]
- 10.In a survey: Red 4, Blue 11, Green 4, Yellow 13. In a pie chart, what angle does Blue get?[3]
- 11.In a survey: Red 14, Blue 14, Green 9, Yellow 4. In a pie chart, what angle does Red get?[3]
- 12.In a survey: Red 10, Blue 5, Green 13, Yellow 7. In a pie chart, what angle does Green get?[3]
Show answers and working
1. 163.6°
Total = 22. Blue fraction = 10/22. 10/22 × 360° = 163.6°.
2. 46.5°
Total = 31. Blue fraction = 4/31. 4/31 × 360° = 46.5°.
3. 75.3°
Total = 43. Green fraction = 9/43. 9/43 × 360° = 75.3°.
4. 83.7°
Total = 43. Red fraction = 10/43. 10/43 × 360° = 83.7°.
5. 120°
Total = 36. Yellow fraction = 12/36. 12/36 × 360° = 120°.
6. 48°
Total = 45. Red fraction = 6/45. 6/45 × 360° = 48°.
7. 180°
Total = 30. Green fraction = 15/30. 15/30 × 360° = 180°.
8. 120°
Total = 33. Yellow fraction = 11/33. 11/33 × 360° = 120°.
9. 122.7°
Total = 44. Blue fraction = 15/44. 15/44 × 360° = 122.7°.
10. 123.8°
Total = 32. Blue fraction = 11/32. 11/32 × 360° = 123.8°.
11. 122.9°
Total = 41. Red fraction = 14/41. 14/41 × 360° = 122.9°.
12. 133.7°
Total = 35. Green fraction = 13/35. 13/35 × 360° = 133.7°.
Worked examples
In a survey: Red 10, Blue 14, Green 6, Yellow 10. In a pie chart, what angle does Green get?
- Total = 40.
- Green fraction = 6/40.
- 6/40 × 360° = 54°.
- Answer: 54°
In a survey: Red 14, Blue 13, Green 3, Yellow 9. In a pie chart, what angle does Green get?
- Total = 39.
- Green fraction = 3/39.
- 3/39 × 360° = 27.7°.
- Answer: 27.7°
In a survey: Red 14, Blue 15, Green 2, Yellow 3. In a pie chart, what angle does Blue get?
- Total = 34.
- Blue fraction = 15/34.
- 15/34 × 360° = 158.8°.
- Answer: 158.8°
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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Frequently asked
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- What should a learner already know before this?
- Start with Introducing Sampling Essentials. Each one has its own free lesson, worksheet and quiz.
- How is the flashcards sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
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- Move on to Key Vocabulary of Introducing Sampling Techniques, Rules and Methods in Introducing Sampling Techniques, Working with Introducing Sampling Techniques, Introducing Sampling Techniques in Examinations, which build directly on this idea.
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