Unit 2: Section 1 - Standard Form With Negative Indices Examples And Worksheets
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14Unit 2: Section 1
Standard form with negative indices
We can write numbers, however small, in standard form.
Activity 7
Copy and complete the table.
Decimal form
Fraction form or multiples of 10
Standard form
1
1
___
____
0.1
1 3 10
5
21
10
10
1
1
1
____
____
5
100
10
2
0.001
5
0.0001
5
1 3 10
25
5
Example 1
1
1
____
____
10
5 0.01
22
5
5
10
2
100
Key Point
1
1
1
____
____
__________
10
5 0.000 001
10
26
2n
5
5
5
10
6
1 000 000
10
n
House mouse
Activity 8
Write down the mass of each of the first three objects in grams
•
in ordinary numbers
•
in standard form.
10
kg
�2
Pigmy shrew
Grain of sand
Copy and complete these statements:
•
A house mouse is … times heavier than a pigmy shrew.
•
A pigmy shrew is … times heavier than a grain of sand.
•
A grain of sand is 100 000 times lighter than a ….
10
kg
10
kg
�3
�7
•
A pigmy shrew is 10 000 times heavier than a ….
Staphylococcus bacterium
•
A … is 100 million times heavier than a ….
•
A house mouse is … 10 000 billion times heavier than a ….
10
kg
�15
Example 2
Write 0.987 in standard form.
1
___
0.987 5 9.87 3
5 9.87 3 10
21
10
x
To display this on your calculator, press
9
8 7
10
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