Common Denominators
Rewrite the fractions as equivalent fractions with a common denominator
2/3 and 1/9
6/9 and 1/9
7/8 - 3/8 =
4/8
What is 2/5 of 45?
18
Draw a model to show 2/3 * 1/2. What is 2/3 of 1/2?
2/6 or 1/3
Jerry had 5 pounds of M&M candies. He wants to put them into bags that hold 1/4 pound. How many 1/4 pound bags can Jerry fill?
20 bags
Rewrite the fractions as equivalent fractions with common denominators.
1/3 and 5/8
8/24 and 15/24
1/12 + 3/4 =
1/12 + 9/12 = 10/12 or (5/6)
What is 1/3 of 27?
9
What is 1/3 * 5/6?
5/18
Ms. McDonough has 6 yards of fabric. She needs 1/3 a yard of fabric make a pillow. How many pillows can Ms. McDonough make using the fabric?
18 pillows
Rewrite the fractions as equivalent fractions with common denominators.
3/15 and 2/3
3/15 and 10/15
1/2 - 1/5 =
5/10 - 2/10 = 3/10
What is 3/4 of 20?
15
2/3 * 5/9 = ?
10/27
Luis has 5 pizzas. He wants to cut the pizzas into 1/8 slices. How many slices will he cut?
40 slices
Rewrite the fractions as equivalent fractions with common denominators.
7/8 and 3/5
35/40 and 24/40
9 1/3 + 3 1/4 =
9 4/12 + 3 3/12 = 12 7/12
There were 28 students in the cafeteria. 3/4 of the students were in Ms. McDonough's class. How many students from Ms. McDonough's class were in the cafeteria?
21 students
2/3 * 12 = ?
8
Write a story problem to represent 5 divided by 1/4.
Solve your problem.
Answers will vary
Rewrite the fractions as equivalent fractions with common denominators.
3/4 and 1/5
15/20 and 4/20
Ms. Cannon ran 3 1/2 miles on Monday and 5 2/3 miles on Tuesday. How far did she run altogether?
3 3/6 + 5 4/6 = 8 7/6 = 9 1/6 miles
Mr. Ashe baked 24 cupcakes. He put blue frosting on 5/8 of the cupcakes. How many cupcakes did Mr. Ashe frost blue?
15 cupcakes
Baoyi had 1/2 pound of strawberries. She used 1/3 of the strawberries to decorate a cake. How many pounds of strawberries did she use?
1/6 pound of strawberries
Ms. Chambers has 1/2 gallon of red paint. She wants to pour the paint into 3 smaller containers, putting the same amount in each container. How much paint should she put in each container?
1/6 gallon of paint