Question

Juan spent 1 1/2 hours working on a project on Monday, 2 hours on Tuesday, and 2 3/4 hours on Thursday. How many hours did it take him to finish the project?​

Answer 1

Monday hours + Thursday hours = Total hours

1 1/2 + 2 3/4 = 3 + (? how do you add 1/2+3/4)

Now, you could convert to all improper fractions:

3/2 + 11/4

6/4 + 11/4 [4 is the Least Common Multiple of 2 and 4]

17/4

4 1/4 [then back to mixed numbers]

Or. you could add 1+2=3

and 1/2 + 3/4

2/4 + 3/4

5/4

1 1/4 [convert to mixed number]

3 + 1 1/4 = 4 1/4 [remember to add the 3]

Explanation: