Free Grade 3 Working with Introducing Sampling Essentials: Step-by-step Method — Recognition Flashcards
Free Grade 3 flashcards for Working with Introducing Sampling Essentials: Step-by-step Method — Recognition: 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
Foundation
30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with introducing sampling essentials: step-by-step method — recognition
Explain working with introducing sampling essentials: step-by-step method — recognition accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing sampling essentials: step-by-step method — recognition
Calculate working with introducing sampling essentials: step-by-step method — recognition accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing sampling essentials: step-by-step method — recognition
Compare working with introducing sampling essentials: step-by-step method — recognition accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with introducing sampling essentials: step-by-step method — recognition
Justify working with introducing sampling essentials: step-by-step method — recognition 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: Step-by-step Method — Recognition 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 3, Blue 5, Green 4, Yellow 13. In a pie chart, what angle does Yellow get?[1]
- 2.In a survey: Red 4, Blue 12, Green 7, Yellow 2. In a pie chart, what angle does Green get?[1]
- 3.In a survey: Red 5, Blue 6, Green 8, Yellow 7. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 5, Blue 9, Green 9, Yellow 4. In a pie chart, what angle does Green get?[1]
- 5.In a survey: Red 11, Blue 9, Green 15, Yellow 14. In a pie chart, what angle does Green get?[2]
- 6.In a survey: Red 7, Blue 7, Green 10, Yellow 12. In a pie chart, what angle does Green get?[2]
- 7.In a survey: Red 4, Blue 8, Green 7, Yellow 2. In a pie chart, what angle does Yellow get?[2]
- 8.In a survey: Red 8, Blue 7, Green 13, Yellow 7. In a pie chart, what angle does Blue get?[2]
- 9.In a survey: Red 2, Blue 9, Green 8, Yellow 10. In a pie chart, what angle does Blue get?[3]
- 10.In a survey: Red 7, Blue 14, Green 12, Yellow 10. In a pie chart, what angle does Yellow get?[3]
- 11.In a survey: Red 9, Blue 12, Green 7, Yellow 6. In a pie chart, what angle does Blue get?[3]
- 12.In a survey: Red 15, Blue 15, Green 15, Yellow 13. In a pie chart, what angle does Red get?[3]
Show answers and working
1. 187.2°
Total = 25. Yellow fraction = 13/25. 13/25 × 360° = 187.2°.
2. 100.8°
Total = 25. Green fraction = 7/25. 7/25 × 360° = 100.8°.
3. 110.8°
Total = 26. Green fraction = 8/26. 8/26 × 360° = 110.8°.
4. 120°
Total = 27. Green fraction = 9/27. 9/27 × 360° = 120°.
5. 110.2°
Total = 49. Green fraction = 15/49. 15/49 × 360° = 110.2°.
6. 100°
Total = 36. Green fraction = 10/36. 10/36 × 360° = 100°.
7. 34.3°
Total = 21. Yellow fraction = 2/21. 2/21 × 360° = 34.3°.
8. 72°
Total = 35. Blue fraction = 7/35. 7/35 × 360° = 72°.
9. 111.7°
Total = 29. Blue fraction = 9/29. 9/29 × 360° = 111.7°.
10. 83.7°
Total = 43. Yellow fraction = 10/43. 10/43 × 360° = 83.7°.
11. 127.1°
Total = 34. Blue fraction = 12/34. 12/34 × 360° = 127.1°.
12. 93.1°
Total = 58. Red fraction = 15/58. 15/58 × 360° = 93.1°.
Worked examples
In a survey: Red 12, Blue 12, Green 9, Yellow 6. In a pie chart, what angle does Red get?
- Total = 39.
- Red fraction = 12/39.
- 12/39 × 360° = 110.8°.
- Answer: 110.8°
In a survey: Red 15, Blue 9, Green 13, Yellow 9. In a pie chart, what angle does Blue get?
- Total = 46.
- Blue fraction = 9/46.
- 9/46 × 360° = 70.4°.
- Answer: 70.4°
In a survey: Red 11, Blue 10, Green 5, Yellow 11. In a pie chart, what angle does Green get?
- Total = 37.
- Green fraction = 5/37.
- 5/37 × 360° = 48.6°.
- Answer: 48.6°
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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