Free Grade 3 Introduction to Introducing Sampling Essentials: Worked Examples Flashcards
Free Grade 3 flashcards for Introduction to Introducing Sampling Essentials: Worked Examples: 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°.
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15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify introduction to introducing sampling essentials: worked examples
Identify introduction to introducing sampling essentials: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introduction to introducing sampling essentials: worked examples
Explain introduction to introducing sampling essentials: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introduction to introducing sampling essentials: worked examples
Calculate introduction to introducing sampling essentials: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introduction to introducing sampling essentials: worked examples
Compare introduction to introducing sampling essentials: worked examples 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 Essentials: Worked Examples 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 12, Blue 14, Green 11, Yellow 10. In a pie chart, what angle does Blue get?[1]
- 2.In a survey: Red 7, Blue 4, Green 14, Yellow 7. In a pie chart, what angle does Green get?[1]
- 3.In a survey: Red 11, Blue 15, Green 12, Yellow 2. In a pie chart, what angle does Yellow get?[1]
- 4.In a survey: Red 5, Blue 2, Green 9, Yellow 2. In a pie chart, what angle does Blue get?[1]
- 5.In a survey: Red 5, Blue 6, Green 14, Yellow 12. In a pie chart, what angle does Red get?[2]
- 6.In a survey: Red 2, Blue 13, Green 3, Yellow 11. In a pie chart, what angle does Green get?[2]
- 7.In a survey: Red 14, Blue 9, Green 2, Yellow 14. In a pie chart, what angle does Red get?[2]
- 8.In a survey: Red 13, Blue 11, Green 9, Yellow 11. In a pie chart, what angle does Red get?[2]
- 9.In a survey: Red 14, Blue 14, Green 9, Yellow 4. In a pie chart, what angle does Green get?[3]
- 10.In a survey: Red 14, Blue 10, Green 11, Yellow 4. In a pie chart, what angle does Blue get?[3]
- 11.In a survey: Red 8, Blue 2, Green 3, Yellow 13. In a pie chart, what angle does Yellow get?[3]
- 12.In a survey: Red 15, Blue 13, Green 6, Yellow 5. In a pie chart, what angle does Yellow get?[3]
Show answers and working
1. 107.2°
Total = 47. Blue fraction = 14/47. 14/47 × 360° = 107.2°.
2. 157.5°
Total = 32. Green fraction = 14/32. 14/32 × 360° = 157.5°.
3. 18°
Total = 40. Yellow fraction = 2/40. 2/40 × 360° = 18°.
4. 40°
Total = 18. Blue fraction = 2/18. 2/18 × 360° = 40°.
5. 48.6°
Total = 37. Red fraction = 5/37. 5/37 × 360° = 48.6°.
6. 37.2°
Total = 29. Green fraction = 3/29. 3/29 × 360° = 37.2°.
7. 129.2°
Total = 39. Red fraction = 14/39. 14/39 × 360° = 129.2°.
8. 106.4°
Total = 44. Red fraction = 13/44. 13/44 × 360° = 106.4°.
9. 79°
Total = 41. Green fraction = 9/41. 9/41 × 360° = 79°.
10. 92.3°
Total = 39. Blue fraction = 10/39. 10/39 × 360° = 92.3°.
11. 180°
Total = 26. Yellow fraction = 13/26. 13/26 × 360° = 180°.
12. 46.2°
Total = 39. Yellow fraction = 5/39. 5/39 × 360° = 46.2°.
Worked examples
In a survey: Red 12, Blue 7, Green 15, Yellow 13. In a pie chart, what angle does Blue get?
- Total = 47.
- Blue fraction = 7/47.
- 7/47 × 360° = 53.6°.
- Answer: 53.6°
In a survey: Red 4, Blue 2, Green 7, Yellow 7. In a pie chart, what angle does Red get?
- Total = 20.
- Red fraction = 4/20.
- 4/20 × 360° = 72°.
- Answer: 72°
In a survey: Red 9, Blue 3, Green 13, Yellow 9. In a pie chart, what angle does Green get?
- Total = 34.
- Green fraction = 13/34.
- 13/34 × 360° = 137.6°.
- Answer: 137.6°
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.
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- Start with Introduction to Introducing Sampling Essentials: Step-by-step Method, What is Introduction to Introducing Sampling Essentials, Data Presentation. Each one has its own free lesson, worksheet and quiz.
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