Free Grade 3 Introduction to Sampling in Context Common Errors: Worked Examples Flashcards
Free Grade 3 flashcards for Introduction to Sampling in Context Common Errors: 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 introduction to sampling in context common errors: worked examples
Identify introduction to sampling in context common errors: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introduction to sampling in context common errors: worked examples
Explain introduction to sampling in context common errors: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introduction to sampling in context common errors: worked examples
Calculate introduction to sampling in context common errors: worked examples accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introduction to sampling in context common errors: worked examples
Compare introduction to sampling in context common errors: 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 Sampling in Context Common Errors: 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 13, Blue 2, Green 10, Yellow 13. In a pie chart, what angle does Yellow get?[1]
- 2.In a survey: Red 3, Blue 8, Green 9, Yellow 6. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 8, Blue 11, Green 10, Yellow 3. In a pie chart, what angle does Yellow get?[1]
- 4.In a survey: Red 9, Blue 14, Green 5, Yellow 5. In a pie chart, what angle does Green get?[1]
- 5.In a survey: Red 13, Blue 10, Green 3, Yellow 11. In a pie chart, what angle does Blue get?[2]
- 6.In a survey: Red 9, Blue 7, Green 13, Yellow 4. In a pie chart, what angle does Red get?[2]
- 7.In a survey: Red 9, Blue 4, Green 13, Yellow 10. In a pie chart, what angle does Blue get?[2]
- 8.In a survey: Red 10, Blue 13, Green 14, Yellow 3. In a pie chart, what angle does Yellow get?[2]
- 9.In a survey: Red 6, Blue 13, Green 12, Yellow 12. In a pie chart, what angle does Green get?[3]
- 10.In a survey: Red 14, Blue 8, Green 8, Yellow 7. In a pie chart, what angle does Blue get?[3]
- 11.In a survey: Red 6, Blue 4, Green 4, Yellow 13. In a pie chart, what angle does Yellow get?[3]
- 12.In a survey: Red 8, Blue 15, Green 4, Yellow 6. In a pie chart, what angle does Red get?[3]
Show answers and working
1. 123.2°
Total = 38. Yellow fraction = 13/38. 13/38 × 360° = 123.2°.
2. 41.5°
Total = 26. Red fraction = 3/26. 3/26 × 360° = 41.5°.
3. 33.8°
Total = 32. Yellow fraction = 3/32. 3/32 × 360° = 33.8°.
4. 54.5°
Total = 33. Green fraction = 5/33. 5/33 × 360° = 54.5°.
5. 97.3°
Total = 37. Blue fraction = 10/37. 10/37 × 360° = 97.3°.
6. 98.2°
Total = 33. Red fraction = 9/33. 9/33 × 360° = 98.2°.
7. 40°
Total = 36. Blue fraction = 4/36. 4/36 × 360° = 40°.
8. 27°
Total = 40. Yellow fraction = 3/40. 3/40 × 360° = 27°.
9. 100.5°
Total = 43. Green fraction = 12/43. 12/43 × 360° = 100.5°.
10. 77.8°
Total = 37. Blue fraction = 8/37. 8/37 × 360° = 77.8°.
11. 173.3°
Total = 27. Yellow fraction = 13/27. 13/27 × 360° = 173.3°.
12. 87.3°
Total = 33. Red fraction = 8/33. 8/33 × 360° = 87.3°.
Worked examples
In a survey: Red 14, Blue 14, Green 10, Yellow 8. In a pie chart, what angle does Red get?
- Total = 46.
- Red fraction = 14/46.
- 14/46 × 360° = 109.6°.
- Answer: 109.6°
In a survey: Red 3, Blue 14, Green 2, Yellow 13. In a pie chart, what angle does Green get?
- Total = 32.
- Green fraction = 2/32.
- 2/32 × 360° = 22.5°.
- Answer: 22.5°
In a survey: Red 4, Blue 6, Green 4, Yellow 13. In a pie chart, what angle does Red get?
- Total = 27.
- Red fraction = 4/27.
- 4/27 × 360° = 53.3°.
- Answer: 53.3°
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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