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P3 Maths Area Paper 4: Error Review
P3 Maths Area Paper 4: Error Review
Ten original items, each with an answer and a one-line explanation.
Direct answers Items 1-3 are basic, 4-6 intermediate and 7-9 challenge, with item 10 as the error review. Time yourself first, then check each answer and redo what is wrong.
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: P3 Maths: Introduction to Area |
| Level | P3 |
02 Questions (10 items)
- FoundationWhat is the area of a rectangle 7 centimetres by 3 centimetres?
- FoundationWhat is the area of a square with sides of 6 centimetres?
- FoundationHow many square centimetres are there in 1 square metre?
- IntermediateA rectangle has an area of 45 square centimetres and a length of 9 centimetres. What is its width?
- IntermediateWhat is the perimeter of a rectangle 12 centimetres by 5 centimetres?
- IntermediateA square has a perimeter of 32 centimetres. What is its area?
- ChallengeThe largest square is cut from a 20 by 15 centimetre card. What area is left?
- ChallengeA room is 5 metres by 4 metres and carpet costs 120 dollars per square metre. What is the total cost?
- ChallengeA square of side 9 centimetres is cut into 9 equal smaller squares. What is the area of each?
- Error redoFor a square of side 5 centimetres, a student wrote 20 square centimetres as the area. What is correct?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 21 square centimetres | Area is length times width, so 7 times 3 = 21 square centimetres. |
| 2 | 36 square centimetres | The area of a square is side times side, so 6 times 6 = 36 square centimetres. |
| 3 | 10000 square centimetres | One metre is 100 centimetres, and 100 times 100 = 10000 square centimetres. |
| 4 | 5 centimetres | 45 divided by 9 = 5 centimetres, since length times width gives the area. |
| 5 | 34 centimetres | The perimeter is (12 + 5) times 2 = 34 centimetres, while the area is 60 square centimetres. |
| 6 | 64 square centimetres | 32 divided by 4 = 8 centimetres per side, so the area is 64 square centimetres. |
| 7 | 75 square centimetres | The largest square has side 15 centimetres: 300 minus 225 = 75 square centimetres. |
| 8 | 2400 dollars | 5 times 4 = 20 square metres, and 20 times 120 = 2400 dollars. |
| 9 | 9 square centimetres | The large square is 81 square centimetres, and 81 divided by 9 = 9 square centimetres. |
| 10 | 25 square centimetres | 20 comes from the perimeter 5 times 4; the area is 5 times 5 = 25 square centimetres. |
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.
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