i really need help with standard form

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how to do standard form

Posted Mon 11th February, 2013 @ 18:01 by amy

1 Answer

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Standard form expressions can look really horrible, but as soon as you start to see what they are and mean you will pick it up very quickly!

Right to start off with..

Standard forms are pretty much used to make answers or shall i say, numbers with alot of zeros on the end of them more 'pretty' or 'appeasing'.

for instance, instead of writing 100000 we can simply write: 1x10^5 (where ^ means to the power of)

Notice that there are 5 zeros on the end, so in this case what ever power 10 is too represents how many 0's there will be on the end of the number.

E.g.

1x10^8 = 100,000,000

1x10^4 = 10000

This however does not work for everything!

E.g

3.2x10^3 = 3200

Here, instead of just adding 3 0's onto the end, we went up by 1 decimal place, and then added on the 2 0's we had left.

like: 4.38x10^5 = 438,000

Negative standard forms are pretty much the opposite where for every number, you go down a decimal place.

e.g 1x10^-3 = 0.001

or 2.3x10^-4 = 0.00023

Hope I helped! Feel free to ask more questions :)

Answered Mon 11th February, 2013 @ 19:33 by Nikorasu