1. Write the following numbers in standard form e.g. 3.24 × 103
|
a. 83.2 |
b. 0.00963 |
c. 123.2 | d. 10.32 |
|
e. 0.32 |
f. 854 000 |
g. 0.0435 | h. 9.6 |
|
i. 541.7 |
j. 321 × 10 2 |
k. 6040 | l. 3241 × 10 3 |
2. Write the following as ordinary numbers e.g. 345.3
|
a. 23.4 × 102 |
b. 321 × 104 |
c. 0.23 × 102 |
d. 3402 × 10-2 |
|
e. 345 × 100 |
f. 0.34 × 101 |
g. 3200 × 102 |
h. 0.93 × 10-1 |
| i. 45 × 102 | j. 1.234 × 104 | k. 9.3 × 108 | l. 0.3 × 100 |
3. Use a calculator to find the following and leave the answer in standard form and round the answer to 2 significant figures:
a. 3467 × 23.56
b. (7.89 × 101) + (43.1 × 100)
c. (2.3 × 104) ÷ (61.9 × 102)
d. (34.56 × 102) x (78.9 × 103)
4. Write the following numbers in standard form:
|
a.
|
73 500 000 000 000 000 000 tonnes
|
The mass of the Earth  |
|
b.
|
3754 m
|
Height of Mt Cook, NZ's highest mountain |
|
c.
|
US$16, 548, 750
|
Most expensive diamond sold at auction |
|
d.
|
278, 564, 356, 980 eggs
|
Number of hens eggs produced in China in 1997 |
|
e.
|
0.00002 mm
|
Size of a typical virus |
|
f.
|
73,459 elephants
|
Number of African Elephants in Tanzania in 1999 |
|
g.
|
0.000088%
|
Weight of Earth's atmosphere as a percentage of its total mass |
|
h.
|
328 m
|
Height of Auckland's Sky Tower. |
|
i.
|
0.5 kg
|
Weight of eucalyptus leaves consumed daily by koala bears |
|
Figures from The Top 10 of Everything (Australian Edition 1999)by Russell Ash published by Dorling Kindersley |
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