Billy spent 4 2/3hours working on his math homework. if he spent another 2 1/3 hours on his reading homework, what is the total time he spent on homework.

All you need to do is add. First add 2/3 and 1/3. That is 3/3 or also equal to 1. Then add the whole numbers- 4, 2, and now 1 from the fractions to get your answer. 7 hours is your total time

Ok, so if you want to simplify, the first thing to do is look at the numbers or signs next to the left side of the parentheses. That sign is positive, so, it will be a positive one (if there are no numbers there it will always be a one, either negative or positive) Now, we multiply +1 by the 2 and the r in parentheses, getting 2 + r. Now, you add 2 + 20, getting 22. And you end up with r + 22.