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Decimal Multiplication and Division Paper 3: Challenge
Decimal Multiplication and Division Paper 3: Challenge
Three factors, chained division, price per kg and how many bottles, training multi-step reasoning.
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)
- FoundationWork out 1.6 times 2.5 times 0.4.
- FoundationWork out 12.6 divided by 0.7 then by 0.5.
- FoundationPork costs $86 per kg. What is the cost of 2.4 kg?
- IntermediateA piece of cloth is 3.2 m long and is cut into 0.4 m lengths. How many pieces?
- IntermediateWork out 0.08 times 250.
- IntermediateWork out 7.5 divided by 0.15.
- Challenge4.5 L of oil is poured into bottles of 0.75 L. How many bottles are filled?
- ChallengeWork out 0.625 times 1 000 then divided by 100.
- ChallengeEach part weighs 0.85 kg. What is the mass of 24 parts?
- Error redoA student works out 1.2 divided by 0.03 and answers 0.4. What is correct?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 1.6. | Do 2.5 times 0.4 to get 1 first, then 1.6 times 1 is 1.6. |
| 2 | 36. | Work from the left: 12.6 divided by 0.7 is 18, and 18 divided by 0.5 is 36. |
| 3 | $206.4. | 86 times 2.4 is 206.4, so the cost is 206.4 dollars. |
| 4 | 8 pieces. | 3.2 divided by 0.4 is 32 divided by 4, which is 8. |
| 5 | 20. | 8 times 250 is 2 000, and two decimal places give 20.00, which is 20. |
| 6 | 50. | Multiply both by 100 to get 750 divided by 15, which is 50. |
| 7 | 6 bottles. | 4.5 divided by 0.75 is 450 divided by 75, which is 6. |
| 8 | 6.25. | 0.625 times 1 000 is 625, and 625 divided by 100 is 6.25. |
| 9 | 20.4 kg. | 0.85 times 24 is 20.4, so the total mass is 20.4 kg. |
| 10 | 40. | Multiply both by 100 to get 120 divided by 3, which is 40; a divisor under 1 must give a larger answer. |
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.
Pair numbers that make a whole first, then finish from the left.Tutor Registration →
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