The population of singapore in 2011 is 5183700. Express 5183700 in a standard form.
+118723 I'll do a different one and then you can do yours 
consider 34879051
At the moment there is an invisible decimal point at the end, after the 1
You have to move it so that there is only one (non zero) number isn front of the point. So it will be moved to between the 3 and the 4
$$3.4879051\times 10^?$$
Now the original number was a big one so the power will be a positive number
the point started at the end
it moved over the 1
it moved over the 5
it moved over the 0
it moved over the 9
it moved over the 7
it moved over the 8
it moved over the 4
so it moved over 7 digits altogether. so the power is +7 or just 7
$$34879051=3.4879051\times 10^7$$
+118723 I'll do a different one and then you can do yours
consider 34879051
At the moment there is an invisible decimal point at the end, after the 1
You have to move it so that there is only one (non zero) number isn front of the point. So it will be moved to between the 3 and the 4
$$3.4879051\times 10^?$$
Now the original number was a big one so the power will be a positive number
the point started at the end
it moved over the 1
it moved over the 5
it moved over the 0
it moved over the 9
it moved over the 7
it moved over the 8
it moved over the 4
so it moved over 7 digits altogether. so the power is +7 or just 7
$$34879051=3.4879051\times 10^7$$
+130511 I'm not sure what you mean by "standard" form
5,183,700 is in "standard" form (as far as I know)
In scientific notation it would be
5.1837 x 106 (this would be the "standard" engineering form, as well)
Maybe there is some other "standard" form of which I'm unaware.......
