0.000025 in standard form
Answers
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HERE IS YOUR ANSWER
25 /100000
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Example
Write 81 900 000 000 000 in standard form: 81 900 000 000 000 = 8.19 × 1013
It’s 1013 because the decimal point has been moved 13 places to the left to get the number to be 8.19
Example
Write 0.000 001 2 in standard form:
0.000 001 2 = 1.2 × 10-6
It’s 10-6 because the decimal point has been moved 6 places to the right to get the number to be 1.2
On a calculator, you usually enter a number in standard form as follows: Type in the first number (the one between 1 and 10). Press EXP . Type in the power to which the 10 is risen.
Manipulation in Standard Form
This is best explained with an example:
Example
The number p written in standard form is 8 × 105
The number q written in standard form is 5 × 10-2
Calculate p × q. Give your answer in standard form.
Multiply the two first bits of the numbers together and the two second bits together:
8 × 5 × 105 × 10-2
= 40 × 103 (Remember 105 × 10-2 = 103)
The question asks for the answer in standard form, but this is not standard form because the first part (the 40) should be a number between 1 and 10.
= 4 × 104
Example
Calculate p ÷ q.
Give your answer in standard form.
This time, divide the two first bits of the standard forms. Divide the two second bits. (8 ÷ 5) × (105 ÷ 10-2) = 1.6 × 107
For more related maths revision topics click here
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