Math 5 · Unit 1: The number system · Cambridge Primary Maths Stage 5

Questions

1. 1. A number with 1 decimal place is rounded to the nearest whole number. What is the smallest number that rounds to 10?

   • 9.5
   • 9.6
   • 9.4
   • 10
   Check

2. 2. A number with 1 decimal place is rounded to the nearest whole number. What is the largest number that rounds to 20?

   • 20.5
   • 20.4
   • 20.9
   • 20
   Check

3. 3. Here is part of a number line. The arrow shows the position of a number. Which sentence is correct for this number?

   • 34.6 rounded to the nearest whole number is 34.
   • 34.4 rounded to the nearest whole number is 34.
   • 33.4 rounded to the nearest whole number is 34.
   • 34.4 rounded to the nearest whole number is 35.
   Check

4. 4. Zara has four number cards. She rounds each number to the nearest whole number. Which of her numbers rounds to 36?

   • 36.5
   • 35.1
   • 36.4
   • 35.4
   Check

5. 5. Match each number to the nearest whole number on the number line.

   • 7.4
   • 8.5
   • 9.9
   • 10.7
   • 11.5

   • 11
   • 7
   • 12
   • 9
   • 10
   Check

6. 6. Which two numbers with 1 decimal place complete the sentences? "_____ rounds to 1" and "_____ rounds to 10".

   • 1.2 and 9.6
   • 1.5 and 9.6
   • 1.2 and 9.4
   • 0.4 and 10.4
   Check

7. 7. Round 4.1 cm to the nearest whole centimetre.

   • 5 cm
   • 4.5 cm
   • 4 cm
   • 3 cm
   Check

8. 8. Round 6.6 cm to the nearest whole centimetre.

   • 6.5 cm
   • 7 cm
   • 6 cm
   • 8 cm
   Check

9. 9. Round 10.1 cm to the nearest whole centimetre.

   • 1 cm
   • 10 cm
   • 11 cm
   • 10.5 cm
   Check

10. 10. Round 8.5 cm to the nearest whole centimetre.

    • 9 cm
    • 8.5 cm
    • 10 cm
    • 8 cm
    Check

11. 11. Use each of the cards 9, 1 and 5 once to make a number that rounds to 20 to the nearest whole number.

    Fill the blanks with these.

    • 0
    • 1
    • 2
    • 9
    • 5
    Check

12. 12. A number with 1 decimal place is rounded to the nearest whole number. What is the smallest number that rounds to 100?

    • 99.9
    • 99.4
    • 99
    • 99.5
    Check

13. 13. A number with 1 decimal place is rounded to the nearest whole number. What is the largest number that rounds to 100?

    • 100.5
    • 100
    • 100.4
    • 100.9
    Check

14. 14. Find the letters of all the numbers that round to 10 to the nearest whole number. Which word do they spell?

    • BEST
    • PELT
    • BELT
    • MELT
    Check

15. 15. Which of the eight numbers do these clues describe? It rounds to 20 to the nearest whole number. Its tenths digit is odd. The sum of its digits is less than 18. Its tens digit is even.

    • 19.9
    • 20.4
    • 19.7
    • 20.3
    Check

16. 16. Rashid chooses two of these number cards and adds the numbers together. He rounds the result to the nearest whole number. His answer is 7. Which two cards did he choose?

    • 2.4 and 4.4
    • 2.4 and 3.4
    • 3.4 and 4.4
    • 1.4 and 4.4
    Check

17. 17. Arun rounds these numbers to the nearest whole number and sorts them into 3 groups. Which table is correct?

    • Rounds to 3: 3.3. Rounds to 4: 3.5, 3.7, 3.9. Rounds to 5: 4.4, 4.5, 4.9.
    • Rounds to 3: 3.3. Rounds to 4: 3.5, 3.7, 3.9, 4.4. Rounds to 5: 4.5, 4.9.
    • Rounds to 3: 3.3. Rounds to 4: 3.5, 3.7, 3.9, 4.4, 4.5. Rounds to 5: 4.9.
    • Rounds to 3: 3.3, 3.5. Rounds to 4: 3.7, 3.9, 4.4. Rounds to 5: 4.5, 4.9.
    Check