Free Grade 3 Working with Working with Range Common Errors Flashcards
Free Grade 3 flashcards for Working with Working with Range Common Errors: 12 real questions with a full answer key and worked solutions. The mean is the total divided by how many values. The median is the middle value in order. The mode is the most common. The range is largest minus smallest.
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30 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify working with working with range common errors
Identify working with working with range common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain working with working with range common errors
Explain working with working with range common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate working with working with range common errors
Calculate working with working with range common errors accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare working with working with range common errors
Compare working with working with range common errors 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 Working with Range Common Errors works
The mean is the total divided by how many values. The median is the middle value in order. The mode is the most common. The range is largest minus smallest.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.For the data 5, 9, 13, 17, 20, find the mean, median, mode and range.[1]
- 2.For the data 1, 1, 2, 4, 11, find the mean, median, mode and range.[1]
- 3.For the data 5, 7, 10, 14, 16, find the mean, median, mode and range.[1]
- 4.For the data 3, 5, 17, 20, 20, find the mean, median, mode and range.[1]
- 5.For the data 2, 12, 22, 24, 28, 30, 31, find the mean, median, mode and range.[2]
- 6.For the data 4, 14, 18, 22, 26, 28, 39, find the mean, median, mode and range.[2]
- 7.For the data 8, 17, 18, 19, 32, 37, 39, find the mean, median, mode and range.[2]
- 8.For the data 9, 20, 23, 30, 31, 33, 34, find the mean, median, mode and range.[2]
- 9.For the data 2, 4, 11, 16, 25, 42, 42, 47, 49, find the mean, median, mode and range.[3]
- 10.For the data 3, 10, 11, 16, 21, 32, 40, 40, 60, find the mean, median, mode and range.[3]
- 11.For the data 11, 14, 31, 37, 41, 42, 54, 57, 60, find the mean, median, mode and range.[3]
- 12.For the data 9, 23, 31, 32, 35, 38, 49, 56, 56, find the mean, median, mode and range.[3]
Show answers and working
1. Mean 12.8, median 13, mode none, range 15
Mean = 64 ÷ 5 = 12.8. Median = middle value in order = 13. Mode = most common = no repeated value. Range = 20 − 5 = 15.
2. Mean 3.8, median 2, mode 1, range 10
Mean = 19 ÷ 5 = 3.8. Median = middle value in order = 2. Mode = most common = 1. Range = 11 − 1 = 10.
3. Mean 10.4, median 10, mode none, range 11
Mean = 52 ÷ 5 = 10.4. Median = middle value in order = 10. Mode = most common = no repeated value. Range = 16 − 5 = 11.
4. Mean 13, median 17, mode 20, range 17
Mean = 65 ÷ 5 = 13. Median = middle value in order = 17. Mode = most common = 20. Range = 20 − 3 = 17.
5. Mean 21.29, median 24, mode none, range 29
Mean = 149 ÷ 7 = 21.29. Median = middle value in order = 24. Mode = most common = no repeated value. Range = 31 − 2 = 29.
6. Mean 21.57, median 22, mode none, range 35
Mean = 151 ÷ 7 = 21.57. Median = middle value in order = 22. Mode = most common = no repeated value. Range = 39 − 4 = 35.
7. Mean 24.29, median 19, mode none, range 31
Mean = 170 ÷ 7 = 24.29. Median = middle value in order = 19. Mode = most common = no repeated value. Range = 39 − 8 = 31.
8. Mean 25.71, median 30, mode none, range 25
Mean = 180 ÷ 7 = 25.71. Median = middle value in order = 30. Mode = most common = no repeated value. Range = 34 − 9 = 25.
9. Mean 26.44, median 25, mode 42, range 47
Mean = 238 ÷ 9 = 26.44. Median = middle value in order = 25. Mode = most common = 42. Range = 49 − 2 = 47.
10. Mean 25.89, median 21, mode 40, range 57
Mean = 233 ÷ 9 = 25.89. Median = middle value in order = 21. Mode = most common = 40. Range = 60 − 3 = 57.
11. Mean 38.56, median 41, mode none, range 49
Mean = 347 ÷ 9 = 38.56. Median = middle value in order = 41. Mode = most common = no repeated value. Range = 60 − 11 = 49.
12. Mean 36.56, median 35, mode 56, range 47
Mean = 329 ÷ 9 = 36.56. Median = middle value in order = 35. Mode = most common = 56. Range = 56 − 9 = 47.
Worked examples
For the data 10, 12, 15, 17, 20, find the mean, median, mode and range.
- Mean = 74 ÷ 5 = 14.8.
- Median = middle value in order = 15.
- Mode = most common = no repeated value.
- Range = 20 − 10 = 10.
- Answer: Mean 14.8, median 15, mode none, range 10
For the data 8, 10, 14, 24, 25, 34, 40, find the mean, median, mode and range.
- Mean = 155 ÷ 7 = 22.14.
- Median = middle value in order = 24.
- Mode = most common = no repeated value.
- Range = 40 − 8 = 32.
- Answer: Mean 22.14, median 24, mode none, range 32
For the data 10, 11, 29, 34, 35, 37, 50, 56, 60, find the mean, median, mode and range.
- Mean = 322 ÷ 9 = 35.78.
- Median = middle value in order = 35.
- Mode = most common = no repeated value.
- Range = 60 − 10 = 50.
- Answer: Mean 35.78, median 35, mode none, range 50
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Finds the median without ordering the data.
Correction: Always put the numbers in order first.
Gives the range as the two end numbers.
Correction: Range is one number: largest minus smallest.
Teacher tips
- · Collect real class data (heights, shoe sizes).
Parent tips
- · Work out your average bedtime over a week.
Real-life applications
- · Sports averages, typical prices, test scores.
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- Start with Rules and Methods in Working with Range Common Errors, Key Vocabulary of Working with Range Common Errors, Working with Range Word Problems. Each one has its own free lesson, worksheet and quiz.
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- Move on to Working with Range Common Errors in Examinations, Working with Range Essentials, Working with Range Techniques, Working with Range Word Problems, which build directly on this idea.
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