What is the sum of 7 2/3 + 5 1/3?

7 2/3 + 5 1/3 = 13

How to do it:

First, you add 2/3 to 1/3 which is 1.

Then you add 7 and 5 which is 12.

And finally, you add the 1 to the 12 which is 13.

what is a pre-existing condition claus?

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.