# How do you add #2.2x10^7#, #6.12x10^6#, #1.51x10^7#, and #1.09x10^6#?

##### 1 Answer

Mar 30, 2015

You first have to get them to the same

(decimal point 1 to the **left** means power goes **up** by 1)

Now you can add:

Dependent of what figures you're adding, you may want to round the result to the appropriate number of significant figures.