Free Grade 3 Working with Introducing Sampling Techniques: Visual Models — Recognition Flashcards
Free Grade 3 flashcards for Working with Introducing Sampling Techniques: Visual Models — 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
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain working with introducing sampling techniques: visual models — recognition
Explain working with introducing sampling techniques: visual models — recognition accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with introducing sampling techniques: visual models — recognition
Calculate working with introducing sampling techniques: visual models — recognition accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with introducing sampling techniques: visual models — recognition
Compare working with introducing sampling techniques: visual models — recognition accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify working with introducing sampling techniques: visual models — recognition
Justify working with introducing sampling techniques: visual models — 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 Techniques: Visual Models — 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 4, Blue 10, Green 13, Yellow 9. In a pie chart, what angle does Yellow get?[1]
- 2.In a survey: Red 10, Blue 9, Green 11, Yellow 4. In a pie chart, what angle does Red get?[1]
- 3.In a survey: Red 7, Blue 6, Green 7, Yellow 8. In a pie chart, what angle does Blue get?[1]
- 4.In a survey: Red 5, Blue 14, Green 10, Yellow 8. In a pie chart, what angle does Yellow get?[1]
- 5.In a survey: Red 15, Blue 4, Green 9, Yellow 7. In a pie chart, what angle does Red get?[2]
- 6.In a survey: Red 9, Blue 6, Green 5, Yellow 5. In a pie chart, what angle does Yellow get?[2]
- 7.In a survey: Red 10, Blue 13, Green 9, Yellow 12. In a pie chart, what angle does Red get?[2]
- 8.In a survey: Red 5, Blue 14, Green 8, Yellow 10. In a pie chart, what angle does Yellow get?[2]
- 9.In a survey: Red 14, Blue 15, Green 15, Yellow 3. In a pie chart, what angle does Yellow get?[3]
- 10.In a survey: Red 11, Blue 11, Green 13, Yellow 6. In a pie chart, what angle does Red get?[3]
- 11.In a survey: Red 4, Blue 14, Green 2, Yellow 8. In a pie chart, what angle does Green get?[3]
- 12.In a survey: Red 4, Blue 12, Green 7, Yellow 6. In a pie chart, what angle does Green get?[3]
Show answers and working
1. 90°
Total = 36. Yellow fraction = 9/36. 9/36 × 360° = 90°.
2. 105.9°
Total = 34. Red fraction = 10/34. 10/34 × 360° = 105.9°.
3. 77.1°
Total = 28. Blue fraction = 6/28. 6/28 × 360° = 77.1°.
4. 77.8°
Total = 37. Yellow fraction = 8/37. 8/37 × 360° = 77.8°.
5. 154.3°
Total = 35. Red fraction = 15/35. 15/35 × 360° = 154.3°.
6. 72°
Total = 25. Yellow fraction = 5/25. 5/25 × 360° = 72°.
7. 81.8°
Total = 44. Red fraction = 10/44. 10/44 × 360° = 81.8°.
8. 97.3°
Total = 37. Yellow fraction = 10/37. 10/37 × 360° = 97.3°.
9. 23°
Total = 47. Yellow fraction = 3/47. 3/47 × 360° = 23°.
10. 96.6°
Total = 41. Red fraction = 11/41. 11/41 × 360° = 96.6°.
11. 25.7°
Total = 28. Green fraction = 2/28. 2/28 × 360° = 25.7°.
12. 86.9°
Total = 29. Green fraction = 7/29. 7/29 × 360° = 86.9°.
Worked examples
In a survey: Red 13, Blue 3, Green 12, Yellow 11. In a pie chart, what angle does Yellow get?
- Total = 39.
- Yellow fraction = 11/39.
- 11/39 × 360° = 101.5°.
- Answer: 101.5°
In a survey: Red 8, Blue 13, Green 10, Yellow 7. In a pie chart, what angle does Blue get?
- Total = 38.
- Blue fraction = 13/38.
- 13/38 × 360° = 123.2°.
- Answer: 123.2°
In a survey: Red 11, Blue 6, Green 12, Yellow 8. In a pie chart, what angle does Blue get?
- Total = 37.
- Blue fraction = 6/37.
- 6/37 × 360° = 58.4°.
- Answer: 58.4°
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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- Start with Working with Introducing Sampling Techniques: Worked Examples. Each one has its own free lesson, worksheet and quiz.
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