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Primary 5 Mathematics Whole Numbers Quiz

Free P5 Maths Whole Numbers quiz, HY3 AI version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 5 Mathematics AI Generated Generated by Tencent HY3 Free Updated 2026-08-17

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Questions

Primary 5 Mathematics Quiz - Whole Numbers

Name: ___________________________
Class: _________
Date: ___________
Score: _______ / 40

Duration: 50 minutes
Total Marks: 40

Instructions:

This quiz has 20 questions on Whole Numbers (numbers up to 10 million).
Write your answers in the spaces provided.
Show your working clearly where needed.
Section A: 10 short questions (1 mark each). Section B: 6 questions (2 marks each). Section C: 4 questions (3 marks each).

Section A (Questions 1–10, 1 mark each)

1. Write the number 4 250 318 in words.
Answer: _______________________________________

2. What is the value of the digit 7 in the number 7 043 219?
Answer: _______________________________________

3. Round 3 846 512 to the nearest hundred thousand.
Answer: _______________________________________

4. Write "nine million six hundred thousand four hundred" in numerals.
Answer: _______________________________________

5. What is the place value of the digit 2 in 5 128 400?
Answer: _______________________________________

6. Round 9 749 999 to the nearest million.
Answer: _______________________________________

7. Write 2 000 000 + 300 000 + 40 000 + 5 000 + 700 + 8 as a single number.
Answer: _______________________________________

8. Which is greater: 6 321 540 or 6 312 540?
Answer: _______________________________________

9. What number is 10 000 more than 4 567 890?
Answer: _______________________________________

10. Write the number 8 004 010 in words.
Answer: _______________________________________

Section B (Questions 11–16, 2 marks each)

11. A factory produced 3 482 615 toys in January and 4 117 308 toys in February. How many toys were produced in the two months altogether?
Answer: _______________________________________

12. Singapore's population is about 5 920 000. Round this number to the nearest hundred thousand. Show your rounding step.
Answer: _______________________________________

13. A book has 1 245 300 words. Another book has 998 750 words. How many more words does the first book have than the second?
Answer: _______________________________________

14. Write the number 6 050 040 in expanded form (as a sum of place values).
Answer: _______________________________________

15. A stadium can hold 2 500 000 people. If 1 875 400 tickets were sold, how many empty seats were there?
Answer: _______________________________________

16. Round 7 654 321 to (a) the nearest thousand, and (b) the nearest ten thousand.
(a) ___________ (b) ___________

Section C (Questions 17–20, 3 marks each)

17. A country collected 8 345 217 tonnes of recycling in 2023 and 9 120 488 tonnes in 2024.
(a) Find the total recycling collected in the two years. (2 m)
(b) Round your answer to the nearest million. (1 m)
Answer: (a) ___________ (b) ___________

18. A bank has 5 678 900 one-dollar coins and 3 421 099 five-dollar coins.
(a) How many coins are there altogether? (2 m)
(b) What is the total value of all the coins in dollars? (1 m)
Answer: (a) ___________ (b) ___________

19. A number is made up of: 4 millions, 0 hundred thousands, 7 ten thousands, 2 thousands, 0 hundreds, 5 tens, and 9 ones.
(a) Write the number in numerals. (1 m)
(b) Write the number in words. (1 m)
(c) Round the number to the nearest thousand. (1 m)
Answer: (a) ___________ (b) ___________ (c) ___________

20. A charity raised $6 250 000. They spent$ 2 480 750 on building wells and $1 739 200 on books.
(a) How much was spent in total? (2 m)
(b) How much money was left? (1 m)
Answer: (a) ___________ (b) ___________

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Answers

Primary 5 Mathematics Quiz - Whole Numbers (Answer Key)

Total Marks: 40
Topic: Whole Numbers (numbers up to 10 million)

Section A (1 mark each)

1. four million two hundred and fifty thousand three hundred and eighteen
Teaching note: Read from left: 4 (millions) → "four million"; 250 (thousands) → "two hundred and fifty thousand"; 318 → "three hundred and eighteen".

2. 7 000 000 (seven million)
Teaching note: The digit 7 is in the millions place, so its value is 7 × 1 000 000 = 7 000 000.

3. 3 800 000
Teaching note: Look at hundred thousands digit = 8, next digit (ten thousands) = 4 (<5), so keep 8 and replace rest with zeros → 3 800 000.

4. 9 600 400
Teaching note: nine million = 9 000 000; six hundred thousand = 600 000; four hundred = 400 → 9 600 400.

5. ten thousands
Teaching note: From right: ones, tens, hundreds, thousands, ten thousands → digit 2 is in ten thousands place.

6. 10 000 000
Teaching note: Million digit = 9, next digit (hundred thousands) = 7 (≥5), round up to 10 million.

7. 2 345 708
Teaching note: Add: 2 000 000 + 300 000 = 2 300 000; +40 000 = 2 340 000; +5 000 = 2 345 000; +700 = 2 345 700; +8 = 2 345 708.

8. 6 321 540
Teaching note: Compare digit by digit from left; at hundred thousands: 2 > 1, so 6 321 540 is greater.

9. 4 577 890
Teaching note: 4 567 890 + 10 000 = 4 577 890.

10. eight million four thousand and ten
Teaching note: 8 (million) → eight million; 004 (thousands) → four thousand; 010 → ten → "eight million four thousand and ten".

Section B (2 marks each)

11. 7 599 923
Working: 3 482 615 + 4 117 308 = 7 599 923.
Marking: 1 m for correct addition, 1 m for correct answer.

12. 5 900 000
Working: 5 920 000 → hundred thousands digit = 9, next digit (ten thousands) = 2 (<5) → round down to 5 900 000.
Marking: 1 m for step, 1 m for answer.

13. 246 550
Working: 1 245 300 − 998 750 = 246 550.
Marking: 1 m for subtraction, 1 m for answer.

14. 6 000 000 + 50 000 + 40
Working: 6 050 040 = 6 millions + 0 hundred thousands + 5 ten thousands + 0 thousands + 0 hundreds + 4 tens + 0 ones.
Marking: 2 m for correct expanded form.

15. 624 600
Working: 2 500 000 − 1 875 400 = 624 600.
Marking: 1 m for subtraction, 1 m for answer.

16. (a) 7 654 000 (b) 7 650 000
Working: (a) thousand digit = 4, next = 3 (<5) → 7 654 000. (b) ten thousand digit = 5, next = 4 (<5) → 7 650 000.
Marking: 1 m each.

Section C (3 marks each)

17. (a) 17 465 705 (b) 17 000 000
Working: (a) 8 345 217 + 9 120 488 = 17 465 705. (b) Million digit = 7, next = 4 (<5) → 17 000 000.
Marking: 2 m (a), 1 m (b).

18. (a) 9 099 999 (b) $22 384 495 *Working:* (a) 5 678 900 + 3 421 099 = 9 099 999 coins. (b) Value = 5 678 900×$ 1 + 3 421 099× $5 =$ 5 678 900 + $17 105 495 =$ 22 384 495.
Marking: 2 m (a), 1 m (b). Common mistake: forget to multiply five-dollar coins by 5.

19. (a) 4 072 059 (b) four million seventy-two thousand and fifty-nine (c) 4 072 000
Working: (a) 4 000 000 + 0 + 70 000 + 2 000 + 0 + 50 + 9 = 4 072 059. (b) read as shown. (c) thousand digit = 2, next = 0 (<5) → 4 072 000.
Marking: 1 m each.

20. (a) $4 219 950 (b)$ 2 030 050
Working: (a) 2 480 750 + 1 739 200 = 4 219 950. (b) 6 250 000 − 4 219 950 = 2 030 050.
Marking: 2 m (a), 1 m (b).