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P4 Maths Four Operations with Decimals Paper 3: Challenge
P4 Maths Four Operations with Decimals Paper 3: Challenge
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 | 25 |
| 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 100 minus 37.85?
- FoundationWhat is 5.25 divided by 2.5?
- FoundationA ribbon is 3.6 m long and is cut into pieces of 0.45 m. How many pieces are there?
- IntermediateA book costs $12.5. How much do 6 books cost?
- IntermediateWhat is 0.75 times 1.6?
- IntermediateWhat is 4.5 times 2.4?
- ChallengeEach can weighs 0.33 kg. What is the total mass of 24 cans?
- ChallengeThere are 8.75 L of oil and each bottle holds 2.5 L. How many bottles can be filled and how much is left over?
- ChallengeWhat is 3 times 0.4 plus 2 times 0.15?
- Error redoError review: a student worked out 4.8 divided by 0.04 as 1.2. What is the correct answer?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 62.15 | Write 100 as 100.00, then 100.00 minus 37.85 = 62.15. |
| 2 | 2.1 | Scale both numbers by 10: 52.5 divided by 25 = 2.1. |
| 3 | 8 pieces | 3.6 divided by 0.45 is 360 divided by 45 = 8. |
| 4 | $75 | 12.5 times 6 = 75, so the total is $75. |
| 5 | 1.2 | 75 times 16 = 1200, and three decimal places give 1.200, that is 1.2. |
| 6 | 10.8 | 45 times 24 = 1080, and two decimal places give 10.80, that is 10.8. |
| 7 | 7.92 kg | 33 times 24 = 792, and two decimal places give 7.92 kg. |
| 8 | 3 bottles, 1.25 L left over | 8.75 divided by 2.5 = 3.5, so 3 bottles are filled and 8.75 minus 3 times 2.5 = 1.25 L is left. |
| 9 | 1.5 | Multiply first, then add: 1.2 plus 0.3 = 1.5. |
| 10 | 120 | Scale both numbers by 100: 480 divided by 4 = 120. |
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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