Question

How do you write `(1.5 times 10^5) - (8 times 10^4)` in standard form?

Answer 1

With addition and subtraction you will have to get the 10-powers the same.

Explanation:

You can write `1.5*10^5=15*10^4`

`15*10^4-8*10^4=(15-8)*10^4=7*10^4`

Since the power is positive we move the dec.point 4 to the right:

`=70000`