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Primary 4 Maths: Adding and Subtracting Fractions | 10 Advanced Items
Primary 4 Maths: Adding and Subtracting Fractions | 10 Advanced Items
Ten items work on different denominators and mixed numbers: common denominators, borrowing from a whole, three-step chains, plus water in a jug and book thickness.
Borrow from the whole Advanced items handle whole numbers and fractions together. When subtracting a mixed number from a whole, borrow one and rename it first; in chains, work left to right or clear the brackets, and show which order you use.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 25 |
| Difficulty mix | Intermediate 10 |
| Chapter | Chapter: Primary 4 Maths: Adding and Subtracting Fractions |
| Level | Primary 4 |
02 Questions (10 items)
- IntermediateWork out 5/6 + 3/8.
- IntermediateWork out 7/12 − 1/4.
- IntermediateWork out 2 1/3 + 1 1/2.
- IntermediateWork out 3 3/4 − 1 5/8.
- IntermediateWork out 4/9 + 5/6.
- IntermediateWork out 5 − 2 3/7.
- IntermediateWork out 7/10 − 1/6.
- IntermediateWork out 3/4 + 5/6 − 7/12.
- IntermediateA jug holds 2 1/2 L. After 3/4 L is used and 1 1/8 L added, how much is in the jug?
- IntermediateThree books are 3/8 cm, 5/8 cm and 7/8 cm thick. What is the total thickness?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | The answer is 29/24, that is 1 5/24. | The common denominator is 24: 20/24 plus 9/24 gives 29/24. |
| 2 | The answer is 4/12, which simplifies to 1/3. | Rename 1/4 as 3/12, then 7 − 3 = 4. |
| 3 | The answer is 3 5/6. | Add the whole numbers to get 3, then 2/6 plus 3/6 gives 5/6. |
| 4 | The answer is 2 1/8. | Write 3 3/4 as 3 6/8, then subtract to get 2 1/8. |
| 5 | The answer is 23/18, that is 1 5/18. | The common denominator is 18: 8/18 plus 15/18 gives 23/18. |
| 6 | The answer is 2 4/7. | Write 5 as 4 7/7, then subtract 2 3/7 to get 2 4/7. |
| 7 | The answer is 16/30, which simplifies to 8/15. | The common denominator is 30: 21/30 minus 5/30 gives 16/30. |
| 8 | The answer is 12/12, that is 1. | The common denominator is 12: 9/12 plus 10/12 minus 7/12 gives 12/12. |
| 9 | The answer is 2 7/8 L. | 2 1/2 minus 3/4 gives 1 3/4, then add 1 1/8 to get 2 7/8. |
| 10 | The answer is 15/8 cm, that is 1 7/8 cm. | Same denominator: 3 + 5 + 7 = 15, written as 1 7/8 cm. |
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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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.