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P4 Maths: Bar Charts and Scales (Paper 4: mistake clinic)
Tutor Prep Guide · reading bar charts and pictograms: value of each grid, comparison, totals and difference, and why the vertical axis starts at zero
P4 Maths: Bar Charts and Scales (Paper 4: mistake clinic)
Paper four drills the reading mistakes that come up most, one step at a time.
Direct answers Write down what one grid stands for every time you read a chart, and the mistakes mostly disappear.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: P4 Maths: Bar Charts and Scales |
| Level | reading bar charts and pictograms: value of each grid, comparison, totals and difference, and why the vertical axis starts at zero |
02 Questions (10 items)
- FoundationThe football bar is 4 grids tall with 5 people per grid. How many chose football?
- FoundationBasketball is 7 grids with 5 people per grid. How many chose it?
- FoundationBadminton takes only 2 grids. How many people is that?
- IntermediateBasketball is the most at 35 and badminton the fewest at 10. What is the difference?
- IntermediateHow many people chose the four sports altogether?
- IntermediateTable tennis has 30 people and badminton 10. How many times as many is table tennis?
- ChallengeIf the vertical axis does not start at zero, what mistake is most likely when reading?
- ChallengeA student answers 2 people for the 2-grid badminton bar. What is correct?
- ChallengeIn a pictogram each symbol stands for 8 people and half a symbol is drawn. How many people is that?
- Error redoIf each grid stood for 10 people and the basketball bar were still 7 grids tall, what would it be worth?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 20 people | 4 times 5 is 20 people, not 4. |
| 2 | 35 people | 7 times 5 gives 35 people. |
| 3 | 10 people | 2 times 5 is 10 people, the smallest item. |
| 4 | 25 people | 35 minus 10 leaves 25 people. |
| 5 | 95 people | 20 plus 35 plus 10 plus 30 makes 95 people. |
| 6 | 3 times | 30 divided by 10 is 3 times. |
| 7 | Judging the gap wrongly and seeing a small difference as a big one | The bar lengths are distorted, so the gap looks larger than it is. |
| 8 | 10 people | 2 grids times 5 people per grid is 10 people. |
| 9 | 4 people | Half a symbol is half of 8, which is 4 people. |
| 10 | 70 people | 7 times 10 is 70; the same height is worth more when each grid is worth more. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
With all four done, go back to the chapter page and revise the reading steps.Tutor Registration →
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