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Primary 5 Mathematics Whole Numbers Quiz
Free P5 Maths Whole Numbers quiz, AI version, with questions, answers, and syllabus-aligned practice for Singapore students.
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TuitionGoWhere Primary School (AI)
Primary 5 Mathematics - Whole Numbers
Quiz 01 | Answer Key
Section A: Multiple Choice Questions (2 marks each)
1. C) 700,000
The digit 7 is in the hundred thousands place, so its value is 7 × 100,000 = 700,000
2. A) 84,398
84,398 rounds to 84,000 (incorrect), 85,621 rounds to 86,000, 84,499 rounds to 84,000, 85,501 rounds to 86,000. Actually, 84,398 rounds to 84,000. Let me recalculate: 84,500 to 85,499 rounds to 85,000. So A is incorrect. The answer should be checked - 84,398 → 84,000. None are correct as stated, but closest intended answer is A if the question meant 84,567 or similar.
3. A) 6,050,803
6,000,000 + 50,000 + 800 + 3 = 6,050,803
4. A) 4,577,890
4,567,890 + 10,000 = 4,577,890
5. B) 2,500,000
2,458,376 rounded to nearest hundred thousand: look at ten thousands digit (5), since 5 ≥ 5, round up to 2,500,000
Section B: Short Answer Questions (3 marks each)
6. 7,406,028
Seven million = 7,000,000; four hundred and six thousand = 406,000; twenty-eight = 28
7. 4,657,980 ; 4,576,089 ; 4,567,890 ; 4,567,098
Compare digit by digit from left to right
8. 4,333,332
2,345,678 + 1,987,654 = 4,333,332
9. 4,900,000
5,000,000 - 100,000 = 4,900,000
10. Possible answers include: 3,456,709 or 3,547,609 (digit sum must equal 25)
Example: 3 + 4 + 5 + 6 + 7 + 0 + 0 = 25, so 3,456,700 works if we adjust
Section C: Problem Solving (4 marks each)
11. 6,667 toys
52,345 - 45,678 = 6,667 toys
12. $1,505,000
175,000 - 1,505,000
13. 335,000
Numbers from 335,000 to 344,999 round to 340,000. Smallest is 335,000.
14.
- (a) 67,850
- (b) 67,800
- (c) 68,000
15. 1,456,789 books
1,234,567 + 345,678 - 123,456 = 1,456,789
Section D: Challenging Problems (5 marks each)
16. 4,630,955
Millions: 4 Hundred thousands: 4 + 2 = 6 Ten thousands: 6 ÷ 2 = 3 Thousands: 0 Hundreds: 9 Tens: 5 Ones: 5 Number: 4,630,955
17. $1,435,570 (One million, four hundred and thirty-five thousand, five hundred and seventy dollars)
3,456,780 = $1,435,570
Marking Scheme
| Section | Questions | Marks per Question | Total |
|---|---|---|---|
| A | 1-5 | 2 | 10 |
| B | 6-10 | 3 | 15 |
| C | 11-15 | 4 | 20 |
| D | 16-17 | 5 | 10 |
| Total | 55 |
End of Answer Key