Math 6 · Unit 1: The number system · Cambridge Primary Maths Stage 6

Questions

1. 1. Neve has four number cards. She chooses two cards. She adds the numbers on the cards together. She rounds the result to the nearest whole number. Her answer is 4. Which two cards did she choose?

   • 0.25 and 1.25
   • 2.25 and 3.25
   • 1.25 and 2.25
   • 0.25 and 2.25
   Check

2. 2. Match each number to its value rounded to the nearest tenth.

   • 8.52
   • 8.77
   • 8.35

   • 8.8
   • 8.4
   • 8.5
   Check

3. 3. Tick the 4 numbers which equal 10 when rounded to the nearest whole number.

   Tick all the right answers.

   • ☐ 10.53
   • ☐ 10.5
   • ☐ 10.35
   • ☐ 9.55
   • ☐ 10.05
   • ☐ 9.5
   • ☐ 9.05
   • ☐ 9.35
   Check

4. 4. Round 7.81 to the nearest tenth.

   • 7.81
   • 7.9
   • 8
   • 7.8
   Check

5. 5. Round 7.81 to the nearest whole number.

   • 9
   • 7
   • 8
   • 7.8
   Check

6. 6. Complete the table: which row of answers is right? Rounded to the nearest tenth, then to the nearest whole number, for 3.78, 4.45, 3.55 and 4.04.

   • Tenths 3.8, 4.4, 3.6, 4.0; whole numbers 4, 4, 4, 4
   • Tenths 3.7, 4.4, 3.5, 4.0; whole numbers 3, 4, 3, 4
   • Tenths 3.8, 4.5, 3.6, 4; whole numbers 4, 5, 4, 4
   • Tenths 3.8, 4.5, 3.6, 4.0; whole numbers 4, 4, 4, 4
   Check

7. 7. Choose the **largest** number from the list that gives 100 when rounded to the nearest whole number. The list: 100.55, 99.99, 100.9, 100.45, 100.5, 99.5, 99.9.

   • 100.45
   • 100.9
   • 100.5
   • 100.55
   Check

8. 8. Use each of the digits 9, 4, 1 and 2 once to make the decimal number closest to 20. Which number is it?

   • 19.42
   • 21.49
   • 19.24
   • 24.19
   Check

9. 9. Pedro has four number cards. He chooses two cards. He adds the numbers on the cards together. He rounds the result to the nearest whole number. His answer is 5. Which two cards did he choose?

   • 2.45 and 3.45
   • 1.45 and 2.45
   • 1.45 and 3.45
   • 0.45 and 3.45
   Check

10. 10. Huan is thinking of a number. She rounds it to the nearest whole number. She says, 'My number is the largest number with 2 decimal places that rounds to 10.' What number is Huan thinking of?

    • 10.50
    • 10.49
    • 10.48
    • 10.99
    Check

11. 11. Here are eight numbers: 3.36, 2.71, 4.03, 3.34, 3.29, 3.15, 2.93, 3.44. Use the clues to identify one of the numbers. The number rounds to 3 to the nearest whole number. The tenths digit is odd. The hundredths digit is even. The number rounds to 3.3 to the nearest tenth.

    • 3.15
    • 3.34
    • 3.29
    • 3.36
    Check

12. 12. The letters hold the numbers in the grid. Find the letters of all the numbers that round to 10.5 to the nearest tenth. What word do they spell?

    • JURY
    • JUNE
    • JULE
    • JULY
    Check

13. 13. Stefan says, 'When I round 16.51 and 17.49 to the nearest whole number, the answer is the same. When I round 16.51 and 17.49 to the nearest tenth, the difference between the answers is one.' Is Stefan correct?

    • Yes
    • No
    Check

14. 14. Match each measurement to its value rounded to the nearest litre.

    • 7.65 litres
    • 9459 millilitres
    • 9.91 litres
    • 11011 millilitres

    • 10 litres
    • 8 litres
    • 11 litres
    • 9 litres
    Check