Question

"Perform the operation. Enter your answer in scientific notation. 7 x 105-5810%"the answer is 120000, I just forgot how to write it in scientific notation

Answer 1

Scientific notation

Initial explanation

When we want to add or substract two numbers that are multiplied by a power of 10, the power of 10 must be the same on both numbers.

In this case

In this case we have:

`7*10^5-5.8*10^5`

Since

7 - 5.8 = 1.2

Then:

`7*10^5-5.8*10^5=1.2*10^5`

Since the first number of the result is from 0 and 10, then it is already scientifc notation