# Math Help - Ok i'm still lost on this one

1. ## Ok i'm still lost on this one

$0.75\text{ kg}\cdot\frac{10^6\text{ mg}}{1\text{ kg}}=0.75\times10^6\text{ mg}=7.5\times10^5\text{ mg}$

0.75kg to mg

Can you explain how you get 10^5

2. ## Re: Ok i'm still lost on this one

7.5x10^5 = 0.75x10^6

3. ## Re: Ok i'm still lost on this one

So, basically when you move the decimal to the right you subtract from the exponent?

What is the decimal goes to the left then what?

4. ## Re: Ok i'm still lost on this one

This is a basic arithmetic, just check it.
7.5x10^5 = 0.75x10^6
7.5x10^5 = 0.075x10^7
7.5x10^5 = 0.0075x10^8
7.5x10^5 = 75x10^4
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5. ## Re: Ok i'm still lost on this one

Can you be more specific because I didnt understand what you are trying to say.
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