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Primary 5 Mathematics Whole Numbers Quiz
Free P5 Maths Whole Numbers quiz, GLM5.3 Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Questions
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Answers
Primary 5 Mathematics Quiz - Whole Numbers — Answer Key (Version 1)
Answer 1.
8,325,140 Marking note: Award both marks for the correct numeral; deduct 1 mark if place values are misaligned (e.g., 8,325,014).
Answer 2.
Seven million, forty thousand and ninety Marking note: Accept minor wording differences (e.g., without "and") if place values are all correct.
Answer 3.
600,000 — the digit 6 is in the hundred thousands place.
Answer 4.
8,497,000 Working: The hundreds digit is 5, so round the thousands digit up: 8,496,502 ≈ 8,497,000.
Answer 5.
28,000 Working: 4,500,000 + 700 + 6 = 4,500,706; 4,528,706 − 4,500,706 = 28,000.
Answer 6.
2,305,088; 2,305,880; 2,350,808; 2,350,880 Reasoning: Compare digits place by place from the left; all numbers share 2,3__, so compare the hundred-thousands and remaining places.
Answer 7.
6,214,308 − 2,978,459 = 3,235,849 Check: 2,978,459 + 3,235,849 = 6,214,308 ✓
Answer 8.
486,205 × 10 = 4,862,050 Reasoning: Multiplying by 10 shifts every digit one place to the left.
Answer 9.
2,304 × 56 = 129,024 Working: 2,304 × 50 = 115,200; 2,304 × 6 = 13,824; 115,200 + 13,824 = 129,024.
Answer 10.
96,480 ÷ 24 = 4,020 Working: 24 × 4,000 = 96,000; remainder 480; 480 ÷ 24 = 20; so 96,480 ÷ 24 = 4,020.
Answer 11.
4,250 ÷ 8 = 531 remainder 2 → 531 full boxes, 2 tins left over Marking note: Both the quotient and the correct interpretation of the remainder are needed for full marks.
Answer 12.
276,500 = 573,500 − 424,750**
Answer 13.
1,240,600 − 358,975 = 881,625 Reasoning: Subtract the known number from the sum to find the other number.
Answer 14.
Rule: add 150,000 each time. Next two numbers: 3,550,000 and 3,700,000
Answer 15.
3,482,150 ≈ 3,482,000 (nearest thousand) 2,296,880 ≈ 2,297,000 (nearest thousand) Estimated sum: 3,482,000 + 2,297,000 = 5,779,000
Answer 16.
Total books = 1,250,000 + 985,000 = 2,235,000 Books per crate = 2,235,000 ÷ 15 = 149,000 books Marking note: Award 1 mark for the correct total, 1 mark for correct division, 1 mark for the unit in the final answer.
Answer 17.
- (a) Greatest: arrange digits in descending order → 986,520
- (b) Smallest: arrange digits in ascending order but do not start with 0, so begin with the smallest non-zero digit → 205,689
- Difference: 986,520 − 205,689 = 780,831
Answer 18.
Total pens = 125 × 144 = 18,000 Pens left = 18,000 − 3,860 = 14,140 pens
Answer 19.
Bottles per day = 475 × 12 = 5,700 Bottles in 25 days = 5,700 × 25 = 142,500 bottles Marking note: Award method marks for both multiplication steps even if the final product is incorrect.
Answer 20.
Larger number = 2,347,896 + 1,586,204 = 3,934,100 Sum of the two numbers = 2,347,896 + 3,934,100 = 6,281,996 New-student note: Since Difference = Larger − Smaller, the larger number is found by adding the difference to the smaller number; then add the two numbers to get their sum.
— End of Answer Key —