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

Questions

1. 1. Paulo is thinking of a number. He says, ‘If I divide my number by 10 and then by 100, the answer is 0.375.’ What number is Paulo thinking of?

   • 0.00375
   • 375
   • 37.5
   • 3.75
   Check

2. 2. Which expression is equivalent to 0.67?

   • 60/10 + 7/100
   • 6/10 + 7/10
   • 60/100 + 70/100
   • 6/10 + 7/100
   Check

3. 3. What does the digit 5 in 3.065 represent?

   • 5 hundredths
   • 5 ones
   • 5 tenths
   • 5 thousandths
   Check

4. 4. Magda regroups 56.079 in different ways but two of her answers are wrong. Tick the 2 answers that are wrong.

   Tick all the right answers.

   • ☐ 5607 tenths + 9 thousandths
   • ☐ 56 ones and 79 thousandths
   • ☐ 56 + 0.79
   • ☐ 50 + 6.079
   • ☐ 50 + 6 + 0.07 + 0.009
   Check

5. 5. Write the operations to complete these multiplication and division loops.

   Fill the blanks with these.

   • ÷ 1000
   • × 1000
   • × 10
   • × 100
   • ÷ 100
   • ÷ 10
   Check

6. 6. Complete the place value diagram.

   Fill the blanks with these.

   • 0.9
   • 1
   • 9
   • 0.1
   • 0.009
   • 0.09
   Check

7. 7. Which is the number six tenths, four hundredths and five thousandths as a decimal?

   • 6.45
   • 0.0645
   • 0.456
   • 0.645
   Check

8. 8. What do the digits 5, 6 and 7 in the number 47.506 represent?

   • 5 hundredths, 6 tenths, 7 ones
   • 5 tenths, 6 hundredths, 7 tens
   • 5 ones, 6 thousandths, 7 tenths
   • 5 tenths, 6 thousandths, 7 ones
   Check

9. 9. Find the missing number. 5.6 × 100 = ?

   • 5.600
   • 560
   • 5600
   • 56
   Check

10. 10. Find the missing number. 0.88 × 1000 = ?

    • 880
    • 88
    • 8800
    • 0.00088
    Check

11. 11. Find the missing number. 41.28 × 10 = ?

    • 41.280
    • 412.8
    • 4.128
    • 4128
    Check

12. 12. Find the missing number. 670 ÷ 1000 = ?

    • 0.67
    • 6.7
    • 670 000
    • 0.067
    Check

13. 13. Find the missing number. 191 ÷ 100 = ?

    • 0.191
    • 19.1
    • 19 100
    • 1.91
    Check

14. 14. Find the missing number. 6.3 ÷ 10 = ?

    • 0.063
    • 6.03
    • 63
    • 0.63
    Check

15. 15. Which expression is equivalent to 4.063?

    • 4 + 0.6 + 0.03
    • 4 + 0.06 + 0.03
    • 4 + 0.6 + 0.3
    • 4 + 0.06 + 0.003
    Check

16. 16. Petra puts some numbers into a function machine. Complete the table to show her results.

    Fill the blanks with these.

    • 70
    • 4.9
    • 9.37
    • 7
    • 0.49
    • 1624
    • 0.937
    • 16240
    Check

17. 17. Write the decimal number that is represented by −4 − 20 − 7/100 − 6/1000 − 9/10

    • 24.976
    • −24.769
    • −42.976
    • −24.976
    Check

18. 18. Ingrid says, ‘I can multiply by 100 by adding two zeros.’ Is Ingrid correct?

    • Yes
    • No
    Check

19. 19. Filipe multiplies a number by 10, then again by 10 and again by 10. His answer is 7. What number did he start with?

    • 70
    • 0.007
    • 0.7
    • 0.07
    Check

20. 20. Four students Anton, Ben, Kasinda and Anya each think of a number. The numbers are 45, 4.5, 0.45 and 0.045. Clues: Ben’s number is a thousand times smaller than Kasinda’s number. Anton’s number is ten times smaller than Kasinda’s number. Anya’s number is ten times bigger than Ben’s number. Which shows each student’s number?

    • Anton 45, Ben 0.045, Kasinda 4.5, Anya 0.45
    • Anton 0.45, Ben 4.5, Kasinda 45, Anya 0.045
    • Anton 4.5, Ben 0.045, Kasinda 45, Anya 0.45
    • Anton 4.5, Ben 0.45, Kasinda 45, Anya 0.045
    Check