Free Grade 3 Rules and Methods in Introducing Sampling Essentials: Worked Examples Flashcards
Free Grade 3 flashcards for Rules and Methods in 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°.
Free
Core
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify rules and methods in introducing sampling essentials: worked examples
Identify rules and methods in introducing sampling essentials: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain rules and methods in introducing sampling essentials: worked examples
Explain rules and methods in introducing sampling essentials: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate rules and methods in introducing sampling essentials: worked examples
Calculate rules and methods in introducing sampling essentials: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare rules and methods in introducing sampling essentials: worked examples
Compare rules and methods in 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 Rules and Methods in 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 8, Blue 9, Green 3, Yellow 3. In a pie chart, what angle does Green get?[1]
- 2.In a survey: Red 2, Blue 4, Green 2, Yellow 8. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 7, Blue 3, Green 12, Yellow 11. In a pie chart, what angle does Yellow get?[1]
- 4.In a survey: Red 13, Blue 14, Green 5, Yellow 13. In a pie chart, what angle does Green get?[1]
- 5.In a survey: Red 11, Blue 6, Green 5, Yellow 4. In a pie chart, what angle does Yellow get?[2]
- 6.In a survey: Red 15, Blue 3, Green 14, Yellow 3. In a pie chart, what angle does Red get?[2]
- 7.In a survey: Red 14, Blue 3, Green 12, Yellow 10. In a pie chart, what angle does Yellow get?[2]
- 8.In a survey: Red 6, Blue 14, Green 3, Yellow 11. In a pie chart, what angle does Red get?[2]
- 9.In a survey: Red 9, Blue 6, Green 11, Yellow 4. In a pie chart, what angle does Blue get?[3]
- 10.In a survey: Red 4, Blue 15, Green 12, Yellow 5. In a pie chart, what angle does Yellow get?[3]
- 11.In a survey: Red 2, Blue 12, Green 2, Yellow 10. In a pie chart, what angle does Red get?[3]
- 12.In a survey: Red 10, Blue 9, Green 3, Yellow 15. In a pie chart, what angle does Green get?[3]
Show answers and working
1. 47°
Total = 23. Green fraction = 3/23. 3/23 × 360° = 47°.
2. 45°
Total = 16. Red fraction = 2/16. 2/16 × 360° = 45°.
3. 120°
Total = 33. Yellow fraction = 11/33. 11/33 × 360° = 120°.
4. 40°
Total = 45. Green fraction = 5/45. 5/45 × 360° = 40°.
5. 55.4°
Total = 26. Yellow fraction = 4/26. 4/26 × 360° = 55.4°.
6. 154.3°
Total = 35. Red fraction = 15/35. 15/35 × 360° = 154.3°.
7. 92.3°
Total = 39. Yellow fraction = 10/39. 10/39 × 360° = 92.3°.
8. 63.5°
Total = 34. Red fraction = 6/34. 6/34 × 360° = 63.5°.
9. 72°
Total = 30. Blue fraction = 6/30. 6/30 × 360° = 72°.
10. 50°
Total = 36. Yellow fraction = 5/36. 5/36 × 360° = 50°.
11. 27.7°
Total = 26. Red fraction = 2/26. 2/26 × 360° = 27.7°.
12. 29.2°
Total = 37. Green fraction = 3/37. 3/37 × 360° = 29.2°.
Worked examples
In a survey: Red 5, Blue 11, Green 9, Yellow 13. In a pie chart, what angle does Blue get?
- Total = 38.
- Blue fraction = 11/38.
- 11/38 × 360° = 104.2°.
- Answer: 104.2°
In a survey: Red 4, Blue 3, Green 11, Yellow 6. In a pie chart, what angle does Red get?
- Total = 24.
- Red fraction = 4/24.
- 4/24 × 360° = 60°.
- Answer: 60°
In a survey: Red 14, Blue 10, Green 13, Yellow 15. In a pie chart, what angle does Red get?
- Total = 52.
- Red fraction = 14/52.
- 14/52 × 360° = 96.9°.
- Answer: 96.9°
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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