Free Grade 3 Working with Introducing Sampling Essentials Flashcards
Free Grade 3 flashcards for Working with Introducing Sampling Essentials: 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
20 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with introducing sampling essentials
Explain working with introducing sampling essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing sampling essentials
Calculate working with introducing sampling essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing sampling essentials
Compare working with introducing sampling essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with introducing sampling essentials
Justify working with introducing sampling essentials 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 Sampling Essentials 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 8, Blue 12, Green 11, Yellow 7. In a pie chart, what angle does Yellow get?[1]
- 2.In a survey: Red 14, Blue 7, Green 14, Yellow 9. In a pie chart, what angle does Yellow get?[1]
- 3.In a survey: Red 12, Blue 12, Green 9, Yellow 15. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 11, Blue 4, Green 8, Yellow 11. In a pie chart, what angle does Red get?[1]
- 5.In a survey: Red 12, Blue 3, Green 12, Yellow 5. In a pie chart, what angle does Yellow get?[2]
- 6.In a survey: Red 13, Blue 10, Green 7, Yellow 5. In a pie chart, what angle does Green get?[2]
- 7.In a survey: Red 6, Blue 8, Green 6, Yellow 4. In a pie chart, what angle does Blue get?[2]
- 8.In a survey: Red 12, Blue 5, Green 5, Yellow 5. In a pie chart, what angle does Yellow get?[2]
- 9.In a survey: Red 5, Blue 10, Green 7, Yellow 14. In a pie chart, what angle does Green get?[3]
- 10.In a survey: Red 4, Blue 9, Green 2, Yellow 8. In a pie chart, what angle does Blue get?[3]
- 11.In a survey: Red 12, Blue 11, Green 14, Yellow 6. In a pie chart, what angle does Yellow get?[3]
- 12.In a survey: Red 10, Blue 7, Green 5, Yellow 8. In a pie chart, what angle does Green get?[3]
Show answers and working
1. 66.3°
Total = 38. Yellow fraction = 7/38. 7/38 × 360° = 66.3°.
2. 73.6°
Total = 44. Yellow fraction = 9/44. 9/44 × 360° = 73.6°.
3. 67.5°
Total = 48. Green fraction = 9/48. 9/48 × 360° = 67.5°.
4. 116.5°
Total = 34. Red fraction = 11/34. 11/34 × 360° = 116.5°.
5. 56.3°
Total = 32. Yellow fraction = 5/32. 5/32 × 360° = 56.3°.
6. 72°
Total = 35. Green fraction = 7/35. 7/35 × 360° = 72°.
7. 120°
Total = 24. Blue fraction = 8/24. 8/24 × 360° = 120°.
8. 66.7°
Total = 27. Yellow fraction = 5/27. 5/27 × 360° = 66.7°.
9. 70°
Total = 36. Green fraction = 7/36. 7/36 × 360° = 70°.
10. 140.9°
Total = 23. Blue fraction = 9/23. 9/23 × 360° = 140.9°.
11. 50.2°
Total = 43. Yellow fraction = 6/43. 6/43 × 360° = 50.2°.
12. 60°
Total = 30. Green fraction = 5/30. 5/30 × 360° = 60°.
Worked examples
In a survey: Red 10, Blue 15, Green 5, Yellow 8. In a pie chart, what angle does Red get?
- Total = 38.
- Red fraction = 10/38.
- 10/38 × 360° = 94.7°.
- Answer: 94.7°
In a survey: Red 6, Blue 13, Green 13, Yellow 4. In a pie chart, what angle does Yellow get?
- Total = 36.
- Yellow fraction = 4/36.
- 4/36 × 360° = 40°.
- Answer: 40°
In a survey: Red 4, Blue 11, Green 8, Yellow 6. In a pie chart, what angle does Blue get?
- Total = 29.
- Blue fraction = 11/29.
- 11/29 × 360° = 136.6°.
- Answer: 136.6°
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 Rules and Methods in Introducing Sampling Essentials, Key Vocabulary of Introducing Sampling Essentials, Data Presentation. 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.
- What comes next after Working with Introducing Sampling Essentials?
- Move on to Introducing Sampling Essentials in Examinations, Introducing Sampling Techniques, Introducing Sampling Word Problems, Introducing Sampling Common Errors, which build directly on this idea.
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