Before school, janine spends 1/10 hour making the bed, 1/5 hour getting dressed, and 1/2 hour eating breakfast. what fraction of an hour does she spend doing these activities?

The answer is 8/10 or 4/5.

First find the least common denominator, which is 10.
1/10 = 1/10               1/5 = 2/10                   1/2 = 5/10

Now you can add the fractions.
1/10 + 2/10 + 5/10 = 8/10

Simplify.
4/5