Kristi jogged for 3/5 of an hour, swam for1/2 an hour, and rode her bicycle for 3/4 of an hour. How long did she exercise?
Look like you are expected to add the fractions:
3/5 + 1/2 + 3/4
so need to add the fractions
use a common denominator
12/20 + 10/20 + 15/20
can you take it from here?
Alternatively
3/5 hour is 36 minutes
1/2 hour is 30 minutes
3/4 hour is 45 minutes
total is ? minutes
1 hour 51 minutes
Agreed
To find out how long Kristi exercised, we need to add the time she spent jogging, swimming, and riding her bicycle.
Kristi jogged for 3/5 of an hour, swam for 1/2 an hour, and rode her bicycle for 3/4 of an hour.
First, let's convert the fractions into a common denominator, so we can add them together.
The common denominator for 5, 2, and 4 is 20.
Now, we can convert the fractions into twentieths of an hour:
Jogging: 3/5 of an hour is equivalent to (3/5) * 20 = 12/20 hours.
Swimming: 1/2 an hour is equivalent to (1/2) * 20 = 10/20 hours.
Biking: 3/4 of an hour is equivalent to (3/4) * 20 = 15/20 hours.
Now, let's add up the fractions:
12/20 + 10/20 + 15/20 = 37/20
To simplify the fraction, we can write it as a mixed number:
37/20 = 1 17/20
So, Kristi exercised for a total of 1 hour and 17 minutes (or 1 17/20 hours).