中文（繁體）
中文（简体）
English
P1 Subtraction within 20: Paper 2 Column Work
P1 Subtraction within 20: Paper 2 Column Work
This paper puts subtraction within 20 into column work and daily situations: borrowing, change, books and seats, then two-step subtraction and comparison, and finally a correction where the two numbers were swapped.
Direct answers Items 01 to 03 are basic borrowing, 04 to 06 cover column form, change and subtraction, 07 to 09 are word and two-step items, and 10 corrects a swap of the two numbers.
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)
- FoundationWhat is 15 take away 7?
- FoundationFill in the gap: 18 – 9 = ?
- FoundationFind the value of 11 – 6.
- IntermediatePut 20 – 12 into a vertical sum and work it out.
- IntermediateA pen is $8 and you hand over a $20 note. What comes back?
- IntermediateHow much is 14 less 8?
- ChallengeThere are 19 books on a shelf and 11 are taken out. How many are still there?
- ChallengeIs 17 – 8 the same as 16 – 7?
- ChallengeCount down from 18: take 5, then take 4. Where do you end up?
- Error redoKeung writes 17 for 20 – 13. Spot the mistake and give the right answer.
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 8. | Bridge through ten: cut 7 into 5 and 2, so 15 – 5 = 10 and 10 – 2 = 8. |
| 2 | 9. | Pull 18 down to 10 first, then take the last 1 off, which leaves 9. |
| 3 | 5. | Drop 1 to reach 10, then remove 5 more: 11 – 6 = 5. |
| 4 | 8. | Nothing sits in the ones place, so trade one ten for ten ones: 10 – 2 = 8 and the tens column empties. |
| 5 | $12. | Change is 20 – 8; two tens minus eight leaves $12. |
| 6 | 6. | Go from 14 down to 10 (that is 4), then another 4, so 6 is left. |
| 7 | 8 books. | Nine ones take away one one gives 8, and the ten cancels the ten, so 8 books stay. |
| 8 | Yes, both give 9. | Each side slides down by one, so both sums land on 9. |
| 9 | 9. | 18 becomes 13, then 13 becomes 9; joining 5 and 4 first gives the same 9. |
| 10 | The correct answer is 7. | He read the numbers the wrong way round; the right sum is 20 – 13 = 7, and a borrow is needed. |
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 2: ten answered items on borrowing, column form, change and two-step work.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.