Take a look at this - it is a good starting point I think.
http://www.mathsisfun.com/numbers/scientific-notation.html
I can probably find a video clip for you if you want :)
Take a look at this - it is a good starting point I think.
http://www.mathsisfun.com/numbers/scientific-notation.html
I can probably find a video clip for you if you want :)