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P1 Hong Kong Coins: Paper 2 Change
P1 Hong Kong Coins: Paper 2 Change
This paper focuses on paying and change: convert prices and payments into cents, handle unit price times quantity, special offers and how many items fit, and fix comparison slips caused by misread decimal places.
Direct answers Answers: 1 $26.00; 2 $24.00 change; 3 $20.00; 4 5 books; 5 $7.50; 6 $36.00 with $64.00 change; 7 9 dollars 90 cents; 8 350 cents, 5 dollars; 9 $28.00; 10 wrong, $6.50 change.
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 Hong Kong Coins |
| Level | P1 |
02 Questions (10 items)
- FoundationWhat is 18 dollars 50 cents plus 7 dollars 50 cents?
- FoundationA 50-dollar note pays for an item costing $26.00. How much change?
- FoundationSweets cost 4 dollars a pack. What do 5 packs cost?
- IntermediateHow many 6-dollar books can 30 dollars buy, and what is left?
- IntermediateThree 2-dollar 50-cent coins are worth how much?
- IntermediateA juice costs 12 dollars. What do three cost, and what is the change from 100 dollars?
- ChallengeWhich is more, 9 dollars 90 cents or 9 dollars 9 cents?
- ChallengeHow many cents is 3 dollars 50 cents, and how many after adding 1 dollar 50 cents?
- ChallengeA shop gives one free for every two bought, at 14 dollars each. What do three cost?
- Error redoError clinic: a notebook costs 13 dollars 50 cents and 20 dollars is paid. Jane gives 7 dollars 50 cents change. Is she right?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | $26.00. 1850 plus 750 is 2600 cents. | Add in cents, and every 100 cents becomes one dollar. |
| 2 | $24.00 change. 5000 minus 2600 is 2400 cents. | Change is money given minus the price. |
| 3 | $20.00. 400 times 5 is 2000 cents. | Unit price times quantity gives the total. |
| 4 | 5 books with nothing left. 3000 divided by 600 is 5 exactly. | Divide for how many fit, and read the remainder as money left. |
| 5 | $7.50. 250 times 3 is 750 cents. | Write 750 cents back as 7 dollars 50 cents. |
| 6 | $36.00 in total, with $64.00 change. 1200 times 3 is 3600, and 10000 minus 3600 is 6400 cents. | Find the total first, then subtract it from the money paid. |
| 7 | 9 dollars 90 cents is more: 990 cents against 909 cents, a difference of 81 cents. | 9 dollars 9 cents is 909 cents, not 990; line up the place values. |
| 8 | 350 cents, and 500 cents after adding 150, which is 5 dollars. | Convert first, add, then convert back if needed. |
| 9 | $28.00, since only two are paid for: 1400 times 2 is 2800 cents. | The free item is not paid for, so multiply by two only. |
| 10 | No, the change is $6.50. 2000 minus 1350 is 650 cents; 7 dollars 50 cents comes from adding instead of subtracting. | Change is payment minus price, so it must be smaller than the payment. |
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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