Least Common Denominators
2/3 and 1/4
12
1/2 + 2/3
3/6 + 4/6 = 7/6
1/3 of 24
8
Devon went to the salon and had 1/5 of an inch of hair cut off. The next day she went back and asked for another 7/10 of an inch to be cut off. How much hair did she have cut off in all?
Devon cut off 9/10 of an inch of hair.
which is greater?
2/3 or 1/2
2/3
1/5 and 2/7
35
3/5 - 1/2
6/10 - 5/10 = 1/10
10
Bridgette owns two dogs. Each day, one dog eats 1/8 of a scoop of dog food and the other dog eats 1/2 of a scoop. Together, how much dog food do the two dogs eat each day?
The two dogs eat 5/8 scoops each day
Which is greater?
7/10 or 4/5
4/5
5/6 and 3/8
1/3 + 3/4
4/12 + 9/12 = 13/12
2/3 x 36
24
Last week Marshall and his roommates ate 1/2 of a carton of yogurt, and this week they ate 5/6 of a carton. How much more yogurt did they eat this week compared to last week?
Marshall and his roommates ate 2/6 of a carton more yogurt this week.
which is greater?
3/4 and 5/8
3/4
1/12 and 4/5
60
1 1/2 + 2 3/4
1 2/4 + 2 3/4 = 3 5/4
3/5 of 30
18
Noah ran 1/4 of a mile and walked 1/8 of a mile. How much farther did Noah run than walk?
Noah ran 1/8 of a mile farther than he walked.
Which is greater?
7/12 and 2/3
2/3
2/9 and 4/5
45
4 3/8 - 1 1/3
4 9/24 - 1 8/24 = 3 1/24
9/11 x 99
81
Of the teacups in Mariana's Tea Shop, 7/12 are white and another 1/3 are orange. What fraction of the teacups are either white or orange?
11/12 of the teacups are white or orange.
9/10 and 4/5
9/10