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P4 Maths Four Operations with Decimals Paper 4: Error Review
P4 Maths Four Operations with Decimals 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: P4 Maths Four Operations with Decimals |
| Level | P4 |
02 Questions (10 items)
- FoundationWhat is 4.7 plus 3.85?
- FoundationWhat is 10 minus 6.4?
- FoundationWhat is 0.75 times 8?
- IntermediateWhat is 2.4 times 0.35?
- IntermediateWhat is 7.2 divided by 0.24?
- IntermediateWhat is 15.6 divided by 1.2?
- ChallengeA notebook costs $8.75. How much do 12 cost, and what change is there from $200?
- Challenge3.6 L of juice is poured into cups of 0.15 L. How many full cups?
- ChallengeWhat is (5.6 + 4.4) times 0.75?
- Error redoError review: a pupil wrote 4 for 0.8 times 0.5. What is the correct answer?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 8.55 | Write 4.7 as 4.70, line up the points, then 4.70 plus 3.85 = 8.55. |
| 2 | 3.6 | Write 10 as 10.0, borrow one from the units column, then 10.0 minus 6.4 = 3.6. |
| 3 | 6 | 75 times 8 = 600, then put back two decimal places: 6. |
| 4 | 0.84 | 24 times 35 = 840, and the two factors have three decimal places in total, so the answer is 0.84. |
| 5 | 30 | Multiply both numbers by 100: 720 divided by 24 = 30. |
| 6 | 13 | Multiply both by 10: 156 divided by 12 = 13. |
| 7 | $105, change $95 | 8.75 times 12 = 105, then 200 minus 105 = 95, so the change is $95. |
| 8 | 24 cups | 3.6 divided by 0.15 is 360 divided by 15 = 24 full cups. |
| 9 | 7.5 | Brackets first: 5.6 plus 4.4 = 10, then 10 times 0.75 = 7.5. |
| 10 | 0.4 | 8 times 5 = 40, and two decimal places are needed, so the answer is 0.4; writing 4 drops the decimal places. |
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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