Free Grade 3 Working with Sampling in Context Common Errors: Step-by-step Method Flashcards
Free Grade 3 flashcards for Working with Sampling in Context Common Errors: 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
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with sampling in context common errors: step-by-step method
Explain working with sampling in context common errors: step-by-step method accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with sampling in context common errors: step-by-step method
Calculate working with sampling in context common errors: step-by-step method accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with sampling in context common errors: step-by-step method
Compare working with sampling in context common errors: step-by-step method accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with sampling in context common errors: step-by-step method
Justify working with sampling in context common errors: 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 Sampling in Context Common Errors: 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 14, Blue 3, Green 9, Yellow 13. In a pie chart, what angle does Green get?[1]
- 2.In a survey: Red 14, Blue 12, Green 13, Yellow 5. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 15, Blue 8, Green 5, Yellow 15. In a pie chart, what angle does Green get?[1]
- 4.In a survey: Red 14, Blue 7, Green 3, Yellow 5. In a pie chart, what angle does Green get?[1]
- 5.In a survey: Red 13, Blue 5, Green 8, Yellow 8. In a pie chart, what angle does Red get?[2]
- 6.In a survey: Red 12, Blue 2, Green 14, Yellow 6. In a pie chart, what angle does Red get?[2]
- 7.In a survey: Red 10, Blue 13, Green 9, Yellow 10. In a pie chart, what angle does Blue get?[2]
- 8.In a survey: Red 12, Blue 7, Green 7, Yellow 5. In a pie chart, what angle does Green get?[2]
- 9.In a survey: Red 5, Blue 6, Green 10, Yellow 10. In a pie chart, what angle does Green get?[3]
- 10.In a survey: Red 14, Blue 7, Green 8, Yellow 5. In a pie chart, what angle does Yellow get?[3]
- 11.In a survey: Red 6, Blue 2, Green 13, Yellow 15. In a pie chart, what angle does Green get?[3]
- 12.In a survey: Red 4, Blue 10, Green 14, Yellow 8. In a pie chart, what angle does Green get?[3]
Show answers and working
1. 83.1°
Total = 39. Green fraction = 9/39. 9/39 × 360° = 83.1°.
2. 114.5°
Total = 44. Red fraction = 14/44. 14/44 × 360° = 114.5°.
3. 41.9°
Total = 43. Green fraction = 5/43. 5/43 × 360° = 41.9°.
4. 37.2°
Total = 29. Green fraction = 3/29. 3/29 × 360° = 37.2°.
5. 137.6°
Total = 34. Red fraction = 13/34. 13/34 × 360° = 137.6°.
6. 127.1°
Total = 34. Red fraction = 12/34. 12/34 × 360° = 127.1°.
7. 111.4°
Total = 42. Blue fraction = 13/42. 13/42 × 360° = 111.4°.
8. 81.3°
Total = 31. Green fraction = 7/31. 7/31 × 360° = 81.3°.
9. 116.1°
Total = 31. Green fraction = 10/31. 10/31 × 360° = 116.1°.
10. 52.9°
Total = 34. Yellow fraction = 5/34. 5/34 × 360° = 52.9°.
11. 130°
Total = 36. Green fraction = 13/36. 13/36 × 360° = 130°.
12. 140°
Total = 36. Green fraction = 14/36. 14/36 × 360° = 140°.
Worked examples
In a survey: Red 5, Blue 4, Green 15, Yellow 9. In a pie chart, what angle does Green get?
- Total = 33.
- Green fraction = 15/33.
- 15/33 × 360° = 163.6°.
- Answer: 163.6°
In a survey: Red 12, Blue 12, Green 2, Yellow 12. In a pie chart, what angle does Red get?
- Total = 38.
- Red fraction = 12/38.
- 12/38 × 360° = 113.7°.
- Answer: 113.7°
In a survey: Red 14, Blue 4, Green 14, Yellow 4. In a pie chart, what angle does Blue get?
- Total = 36.
- Blue fraction = 4/36.
- 4/36 × 360° = 40°.
- Answer: 40°
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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