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Primary 4 Maths: Adding and Subtracting Fractions | 10 Basic Items
Primary 4 Maths: Adding and Subtracting Fractions | 10 Basic Items
Ten items build the base: same denominators, renaming fractions, subtracting from one, plus two everyday measures.
Same denominator first Adding and subtracting fractions needs two moves: with equal denominators work on the numerators; with different denominators rename first. These ten items stay on those two moves, and every answer is simplified so that the habit forms early.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 25 |
| Difficulty mix | Foundation 10 |
| Chapter | Chapter: Primary 4 Maths: Adding and Subtracting Fractions |
| Level | Primary 4 |
02 Questions (10 items)
- FoundationWork out 3/8 + 2/8.
- FoundationWork out 7/9 − 4/9 and simplify.
- FoundationWork out 1/2 + 1/4.
- FoundationWork out 5/6 − 1/3.
- FoundationWork out 2/5 + 3/10.
- FoundationWork out 1 − 3/7.
- FoundationWork out 3/4 + 5/8.
- FoundationWork out 9/10 − 2/5.
- FoundationA rope is 7/8 m long. After 3/8 m is used, how much is left?
- FoundationA cup holds 3/5 L of juice. After adding 1/5 L, what is the total?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | The answer is 5/8. | Same denominator, so add the numerators: 3 + 2 = 5. |
| 2 | The answer is 3/9, which simplifies to 1/3. | Subtract the numerators to get 3, then divide 3 and 9 by 3. |
| 3 | The answer is 3/4. | Rename 1/2 as 2/4, then add 1/4 to get 3/4. |
| 4 | The answer is 3/6, which simplifies to 1/2. | Rename 1/3 as 2/6, subtract to get 3/6, then simplify. |
| 5 | The answer is 7/10. | Rename 2/5 as 4/10, then add 3/10. |
| 6 | The answer is 4/7. | Write 1 as 7/7, then 7 − 3 = 4. |
| 7 | The answer is 11/8, that is 1 3/8. | Rename 3/4 as 6/8, add 5 to get 11/8, then write it as a mixed number. |
| 8 | The answer is 5/10, which simplifies to 1/2. | Rename 2/5 as 4/10, subtract to get 5/10, then simplify. |
| 9 | The answer is 4/8 m, that is 1/2 m. | Same denominator: 7 − 3 = 4, and 4/8 simplifies to 1/2. |
| 10 | The answer is 4/5 L. | Same denominator, so add the numerators: 3 + 1 = 4. |
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.