Cumulative Practice

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Cumulative Practice
for Chapters 1 and 2
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4.
(m 5 ؒ m 7 )4 ، (3m 2 )3
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3.
 3 ؒ  3
 7  7
26
Cumulative Practice for Chapters 1 and 2
(M)MIFEPC3A_CRCh01-02.indd 26
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5.
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(8 )
0 4
7.
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Extra Practice Course 3A
(M)MIFEPC3A_CRCh01-02.indd 27
27
8/16/12 8:00 PM
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16. 7.4 ؒ 10؊4 ؊ 6.5 ؒ 10؊5 and 3.6 ؒ 10؊5 ؊ 7.6 ؒ 10؊6
28
© Marshall Cavendish International (Singapore) Private Limited.
15. 2.28 ؒ 1012 ؉ 2.69 ؒ 1012 and 8.63 ؒ 1012 ؊ 4.09 ؒ 1012
Cumulative Practice for Chapters 1 and 2
(M)MIFEPC3A_CRCh01-02.indd 28
8/16/12 8:00 PM
Name:ÊÊÊ
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Date:ÊÊÊ
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17.
4.8 ؒ 108 ؒ 5 ؒ 108 and 7.3 ؒ 10؊6 ؒ 4 ؒ 10؊3
4
6
؊6
؊6
18. 8.4 ؒ 10 ، (7 ؒ 10 ) and 7.5 ؒ 10 ، (1.5 ؒ 10 )
© Marshall Cavendish International (Singapore) Private Limited.
5ÀÍgÊg:SÊg:ÄÒÀggÍÊÊÍgÊ:¨¨À¨À:Íe unit in prefix fÀ®ÊÊ
19. 0.000000043 meter
20. 0.000093 second
21. 42,000,000,000 hertz
22. 69,000 bytes
Extra Practice Course 3A
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Name:ÊÊÊ
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Date:ÊÊÊ
23.
The Great Pyramid of Khufu in Egypt is one of the Seven Wonders of
the Ancient World. It is built on a square base with an approximate area
of 53,065.73 square meters. What is the approximate side length of the
square base? Round your answer to the nearest tenth.
24.
10
The volume of the Moon is approximately 2.1958 ؒ 10 cubic kilometers.
Find the radius of the Moon, in kilometers, in scientific notation. Round
the coefficient to the nearest tenth. Use 3.14 as an approximation for O.
25. The weight of an empty box is 56.7 grams. If there are 940 feathers with unit
weight of 0.000567 kilogram in the box, find the total weight, in kilogram,
of the box with 940 feathers inside. Write your answer in scientific notation.
Round the coefficient to the nearest tenth.
30
© Marshall Cavendish International (Singapore) Private Limited.
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Cumulative Practice for Chapters 1 and 2
(M)MIFEPC3A_CRCh01-02.indd 30
8/16/12 8:00 PM
Name:ÊÊÊ
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Date:ÊÊÊ
-Øg®Ê-ÙÊÛÒÀÊÙÀ®Ê
© Marshall Cavendish International (Singapore) Private Limited.
26. The table lists the speed of movement of two different types of
microorganisms.
Microorganism
Speed of Movement
A
7 mm/s
B
180 L m/s
a)
Write each speed in meter per second, using scientific notation. Round
the coefficient to the nearest tenth if necessary.
b)
Which microorganism moves at a slower speed?
c)
Find the difference in their speed of movement, in meter per second.
Write your answer in scientific notation and round the coefficient to the
nearest tenth if necessary.
27. The diagram below shows the rate at which 5 bacteria multiply in minutes.
1 minute
2 minutes
3 minutes
How many bacteria are there in 15 minutes? Write this number in exponential
form and evaluate.
Extra Practice Course 3A
(M)MIFEPC3A_CRCh01-02.indd 31
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8/16/12 8:00 PM

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