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P1 Subtraction within 20: Paper 1 Basics
P1 Subtraction within 20: Paper 1 Basics
This paper starts with subtraction within 20, then covers the break-ten method, column form and taking away from 20, before comparing two subtractions and correcting an answer that stopped half way. Every item has an answer and a one-line note.
Direct answers Items 01 to 03 use break-ten, 04 to 06 cover column form and taking from 20, 07 to 09 are word and comparison items, and 10 corrects a wrong answer.
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: P1 Subtraction within 20 |
| Level | P1 |
02 Questions (10 items)
- FoundationFind the answer to 15 – 8.
- FoundationHow much is 17 minus 9?
- FoundationTake 4 off 13. What is left?
- IntermediateDo 18 – 6 in a column and give the result.
- IntermediateA jar holds 20 sweets. If 7 are eaten, how many are still in it?
- IntermediateWhat is 16 minus 8?
- ChallengeThere are 14 sweets in a tin and 6 are taken out. How many are left in the tin?
- ChallengeWork out 12 – 5 and 11 – 4. Do both give the same number?
- ChallengeA hall row seats 18 pupils and 9 are already sitting. How many places are free?
- Error redoMei answered 6 for 13 – 6. Say what is wrong and give the right value.
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 7. | Use the break-ten method: 15 minus 5 is 10, then minus 3 gives 7. |
| 2 | 8. | Take 7 away from 17 to reach 10, then take 2 more to get 8. |
| 3 | 9. | 13 minus 3 leaves 10, then one more makes 9. |
| 4 | 12. | Line up the ones: 8 minus 6 is 2, and the ten stays, so the answer is 12. |
| 5 | 13. | Split 7 into 5 and 2: 20 minus 5 is 15, then minus 2 gives 13. |
| 6 | 8. | Since 8 plus 8 is 16, taking 8 from 16 leaves 8. |
| 7 | 8 sweets. | Subtract 4 from 14 to reach 10, then take 2 more, leaving 8. |
| 8 | They are equal; both give 7. | Break ten in both: 12 minus 5 is 7 and 11 minus 4 is also 7. |
| 9 | 9 seats. | Because 9 plus 9 is 18, taking 9 away leaves 9. |
| 10 | The correct answer is 7. | 13 minus 3 is 10 and 3 more gives 7; she stopped after taking only 3. |
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.
P1 subtraction within 20 paper 1: ten answered items on break-ten, column form, taking from 20 and comparing.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.