Adding Fractions
The first step to adding fractions with unlike denominators.
Create equivalent fractions with a common denominator
2 1/4 + 1 2/5
3 13/20
1/4, 1/2, 3/4, ...
add 1/4
What is something you need to make sure you do at the end of every fractional problem
Have the fraction in simplest form
2 1/4 + 3 5/8
5 7/8
2/5 + 3/10 =
7/10
Estimate: 1 5/6 + 2 2/11
4
Name the rule:
1 9/10, 1 7/10, 1 1/2, 1 3/10, 1 1/10
subtract 1/5
7/8 - 2/9
47/72
7 3/8 - 2 7/9
4 43/72
5/6 + 3/8
1 5/24
4 1/8 + 2 1/3
6 11/24
Name the rule and find the missing term:
2 5/12, 2 1/6, 1 11/12, __, 1 5/12
Rule: subtract 1/4
Missing term: 1 2/3
Estimate: 3 2/5 - 5/8
3
5 17/18 - 2 2/3
3 5/18
Estimate: 8/9 + 4/7
1 1/2
At the deli, Ricardo ordered 3 1/5 pounds of cheddar cheese and 2 3/4 pounds of mozzarella cheese. How many pounds of cheese did he order all together?
5 19/20 pounds
Jarrett's puppy weighted 3 3/4 ounces at birth. At one week old, the puppy weighted 5 1/8 ounces. At two weeks old, the puppy weighed 6 1/2 ounces. If the weight gain continues in this pattern, how much will the puppy weigh at three weeks old?
7 7/8 ounces
8 - 1 1/9
6 8/9
Estimate: 3 2/3 - 1 11/12
1 1/2
Mike is mixing paint for his walls. He mixes 1/6 gallon blue paint and 5/8 gallon green paint in a large container. What fraction represents the total amount of paint Mike mixes?
19/24 Gallon
Jill walked 8 1/8 miles to a park and then 7 2/5 miles home. How many miles did she walk?
15 21/40 mi
Mr. Conners drove 78 1/3 miles on Monday, 77 1/2 miles on Tuesday, and 75 5/6 miles on Wednesday. If he continues this patter on Thursday and Friday, how many fewer miles will he drive on Friday than on Tuesday?
3 3/4 Miles
Keisha makes a large sandwich for a family picnic. She takes 1/2 of the sandwich to the picnic. At the picnic, her family eats 3/8 of the whole sandwich. What fraction of the whole sandwich does Keisha bring back from the picnic?
1/4
Carlene bought 8 1/16 yards of ribbon to decorate a shirt. She only used 5 1/2 yard. How much ribbon does she have left over?
2 9/16 Yards