中文（繁體）
中文（简体）
English
Decimal Multiplication and Division Paper 4: Error Clinic
Decimal Multiplication and Division Paper 4: Error Clinic
Ten real slips taken apart, from misplaced points to missing zeros.
Direct answers Answers and explanations for all ten questions
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: P5 Decimal Multiplication and Division |
| Level | P1 |
02 Questions (10 items)
- FoundationA student works out 0.4 times 0.5 and answers 2. What is correct?
- FoundationA student works out 6.3 times 100 and answers 63. What is correct?
- FoundationA student works out 0.8 divided by 4 and answers 2. What is correct?
- IntermediateA student works out 2.4 divided by 0.6 and answers 0.4. What is correct?
- IntermediateA student works out 0.15 times 0.2 and answers 0.3. What is correct?
- IntermediateA student works out 45 divided by 0.9 and answers 0.5. What is correct?
- ChallengeA student works out 1.25 times 8 and answers 1. What is correct?
- ChallengeA student works out 0.06 times 1 000 and answers 0.6. What is correct?
- ChallengeEach bag of sugar weighs 0.35 kg. A student answers 0.42 kg for 12 bags. What is correct?
- Error redoA student works out 3.6 divided by 0.04 and answers 0.9. What is correct?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 0.2. | 4 times 5 is 20, and two decimal places give 0.20, that is 0.2. |
| 2 | 630. | Times 100 moves the point two places right, so 6.3 becomes 630. |
| 3 | 0.2. | 8 divided by 4 is 2, and the one decimal place gives 0.2; the student multiplied instead. |
| 4 | 4. | Multiply both by 10 to get 24 divided by 6, which is 4. |
| 5 | 0.03. | 15 times 2 is 30, and three decimal places give 0.030, which is 0.03. |
| 6 | 50. | Multiply both by 10 to get 450 divided by 9, which is 50. |
| 7 | 10. | 125 times 8 is 1 000, and two decimal places give 10.00, which is 10. |
| 8 | 60. | Times 1 000 moves the point three places right, so 0.060 becomes 60. |
| 9 | 4.2 kg. | 0.35 times 12 is 4.2, so the total is 4.2 kg. |
| 10 | 90. | Multiply both by 100 to get 360 divided by 4, which is 90. |
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.
Name the faulty step, give the correct method, then check by estimating.Tutor Registration →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.