中文（繁體）
中文（简体）
English
P1 Subtraction within 20: Paper 3 Word Problems
P1 Subtraction within 20: Paper 3 Word Problems
This paper goes one step further: tens borrowing, column subtraction of two-digit numbers, stickers and drink packs, finding the starting number from a result, then two-step subtraction and a correction where the wrong amount was taken away.
Direct answers Items 01 to 03 cover tens borrowing, 04 to 06 column form and finding a missing number, 07 to 09 are two-step and comparison items, and 10 corrects a wrong subtrahend.
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)
- FoundationStart with 20 counters and take 15 away. How many are left?
- FoundationSubtract 19 from 12. What is the answer?
- FoundationCount back 15 from 9. Which number do you reach?
- IntermediateSet out 18 – 13 in columns and find the result.
- IntermediateA pack holds 20 stickers and 14 are used. How many remain?
- IntermediateA number minus 8 gives 9. Find that number.
- ChallengeThree boxes hold 20 packs. 7 go on day one and 5 on day two. How many stay?
- ChallengeDo 20 – 4 and 19 – 3 give the same result?
- ChallengeWork out 18 – 9, then add 7 to the result.
- Error redoLing worked out 16 – 9 and answered 9. What went wrong and what is correct?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 5. | Counting back in two steps gives 5. |
| 2 | 7. | The column layout keeps ones under ones, so 7 is right. |
| 3 | 6. | Counting back slowly gives 6; adding it back checks the work. |
| 4 | 5. | Ones and tens subtract cleanly, leaving 5. |
| 5 | 6. | 6 stickers stay once the used ones are gone. |
| 6 | 17. | Addition undoes subtraction, so the hidden number is 17. |
| 7 | 8. | Taking both days off in one go leaves 8 packs. |
| 8 | Yes, both give 16. | 20 minus 4 is 16 and 19 minus 3 is also 16, so they match. |
| 9 | 9 first, then 16. | 18 minus 9 is 9, and 9 plus 7 is 16. |
| 10 | The correct answer is 7. | 16 minus 6 is 10 and 3 more gives 7; she treated it as 16 minus 7. |
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 3: ten answered items on tens borrowing, column form and two-step problems.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.