Free Grade 3 Working with Introducing Sampling Techniques: Step-by-step Method Flashcards
Free Grade 3 flashcards for Working with Introducing Sampling Techniques: Step-by-step Method: 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 techniques: step-by-step method
Explain working with introducing sampling techniques: step-by-step method accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing sampling techniques: step-by-step method
Calculate working with introducing sampling techniques: step-by-step method accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing sampling techniques: step-by-step method
Compare working with introducing sampling techniques: step-by-step method accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with introducing sampling techniques: step-by-step method
Justify working with introducing sampling techniques: step-by-step method 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 Techniques: Step-by-step Method 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 5, Blue 7, Green 13, Yellow 5. In a pie chart, what angle does Red get?[1]
- 2.In a survey: Red 14, Blue 10, Green 7, Yellow 3. In a pie chart, what angle does Yellow get?[1]
- 3.In a survey: Red 5, Blue 5, Green 7, Yellow 5. In a pie chart, what angle does Red get?[1]
- 4.In a survey: Red 3, Blue 7, Green 4, Yellow 12. In a pie chart, what angle does Red get?[1]
- 5.In a survey: Red 2, Blue 12, Green 7, Yellow 4. In a pie chart, what angle does Green get?[2]
- 6.In a survey: Red 12, Blue 11, Green 7, Yellow 6. In a pie chart, what angle does Yellow get?[2]
- 7.In a survey: Red 3, Blue 7, Green 2, Yellow 2. In a pie chart, what angle does Blue get?[2]
- 8.In a survey: Red 11, Blue 12, Green 7, Yellow 7. In a pie chart, what angle does Blue get?[2]
- 9.In a survey: Red 13, Blue 4, Green 11, Yellow 8. In a pie chart, what angle does Red get?[3]
- 10.In a survey: Red 10, Blue 10, Green 11, Yellow 15. In a pie chart, what angle does Green get?[3]
- 11.In a survey: Red 3, Blue 2, Green 13, Yellow 5. In a pie chart, what angle does Green get?[3]
- 12.In a survey: Red 2, Blue 5, Green 15, Yellow 7. In a pie chart, what angle does Red get?[3]
Show answers and working
1. 60°
Total = 30. Red fraction = 5/30. 5/30 × 360° = 60°.
2. 31.8°
Total = 34. Yellow fraction = 3/34. 3/34 × 360° = 31.8°.
3. 81.8°
Total = 22. Red fraction = 5/22. 5/22 × 360° = 81.8°.
4. 41.5°
Total = 26. Red fraction = 3/26. 3/26 × 360° = 41.5°.
5. 100.8°
Total = 25. Green fraction = 7/25. 7/25 × 360° = 100.8°.
6. 60°
Total = 36. Yellow fraction = 6/36. 6/36 × 360° = 60°.
7. 180°
Total = 14. Blue fraction = 7/14. 7/14 × 360° = 180°.
8. 116.8°
Total = 37. Blue fraction = 12/37. 12/37 × 360° = 116.8°.
9. 130°
Total = 36. Red fraction = 13/36. 13/36 × 360° = 130°.
10. 86.1°
Total = 46. Green fraction = 11/46. 11/46 × 360° = 86.1°.
11. 203.5°
Total = 23. Green fraction = 13/23. 13/23 × 360° = 203.5°.
12. 24.8°
Total = 29. Red fraction = 2/29. 2/29 × 360° = 24.8°.
Worked examples
In a survey: Red 7, Blue 5, Green 12, Yellow 3. In a pie chart, what angle does Green get?
- Total = 27.
- Green fraction = 12/27.
- 12/27 × 360° = 160°.
- Answer: 160°
In a survey: Red 13, Blue 9, Green 12, Yellow 4. In a pie chart, what angle does Blue get?
- Total = 38.
- Blue fraction = 9/38.
- 9/38 × 360° = 85.3°.
- Answer: 85.3°
In a survey: Red 15, Blue 12, Green 15, Yellow 15. In a pie chart, what angle does Blue get?
- Total = 57.
- Blue fraction = 12/57.
- 12/57 × 360° = 75.8°.
- Answer: 75.8°
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
How mastery is evidenced, and which standards it maps to.
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- Start with What is Working with Introducing Sampling Techniques, Rules and Methods in Introducing Sampling Techniques. Each one has its own free lesson, worksheet and quiz.
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