Question

What is the sum of 4.9 × 102 and 6.8 × 103?

Answer 1

The sum is

`7.92* 10^3`

Explanation:

We want to add

`4.9* 10^2 and 6.8* 10^3`

The sum of these two numbers is:

`4.9* 10^2 +6.8* 10^3`

This is the same as:

`4.9* 100 +6.8* 1000`

`490 +6800=7290`

We rewrite 7290 in standard form to get;

`7.92* 10^3`