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Decimal approximations

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  • Question 1:
    1 pts
    		Is the following expression true or false? 384.49≈385384.49 \approx 385
  • Question 2:
    1 pts
    		Round 2.9652.965 to the nearest tenth. Use the number line.
    2.82.8
    2.92.9
    3.03.0
    3.43.4
  • Question 3:
    1 pts
    		Round 4.22314.2231 to the nearest hundredth. Use the number line.
    4.214.21
    4.224.22
    4.234.23
    4.244.24
  • Question 4:
    1 pts
    		Round 4.103544.10354 to the nearest thousandth. Use the number line.
    4.1024.102
    4.1034.103
    4.1044.104
    4.1054.105
  • Question 5:
    2 pts
    		Express 1.32671.3267 to two decimal places.

    1.311.31

    1.321.32

    1.331.33

    1.341.34

  • Question 6:
    2 pts
    		Express 0.46638170.4663817 to three decimal places.

    0.4650.465

    0.4660.466

    0.4670.467

    0.4680.468

  • Question 7:
    2 pts
    		The mass of a ship is stated as 37 659 tonnes to the nearest tonne. Are the following statements correct? The mass is greater than 37659.4 tonnes.
  • Question 8:
    2 pts
    		The length of an envelope is 18cm18 cm to the nearest cmcm. What is the smallest possible real length of the envelope?

    16.516.5

    17.017.0

    17.517.5

    17.917.9

  • Question 9:
    3 pts
    		The interval on the number line below shows all the possible real lengths of the envelope (to the nearest cmcm). Write down the correct numbers for the lower and upper limits of the interval. represented on the diagram by A and B.
    A=30.5;B=31.5A=30.5; B=31.5
    A=30.4;B=31.4A=30.4; B=31.4
    A=30.0;B=31.0A=30.0; B=31.0
    A=30.1;B=31.1A=30.1; B=31.1
  • Question 10:
    3 pts
    		Write the number 443.9591 correct to 5 significant figures.

    443.95443.95

    443.96443.96

    443.60443.60

    443.90443.90

  • Question 11:
    3 pts
    		The length of a paper is 18.5cm18.5 cm to the nearest tenth of a cm.cm. The interval on the number line below shows all the possible real lengths of the paper. Write down the numbers represented on the number line by A, B and C.
    A=18.45;B=18.5;C=19.0A=18.45; B=18.5; C=19.0
    A=18.0;B=18.5;C=19.0A=18.0; B=18.5; C=19.0
    A=18.49;B=18.5;C=18.51A=18.49; B=18.5; C=18.51
    A=18.45;B=18.5;C=18.55A=18.45; B=18.5; C=18.55

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