Question

3.1 plus 7.4 plus 6.9

Answer 1

17.4

Explanation:

if you estimate all of these you get 3,7, and 7, these(added together) are 17,

Answer 2

Answer: 17.4

Explanation:

There isn't much to it... it's basic addition.

I guess if you were not using a calculator you would set it up like this:

3.1

+7.4

+6.9

---------

17.4