Problem Solving on Multiplying and Dividing Fractions

When Multiplying/Dividing Mixed Numbers you MUST 1st...

• Find the square roots.

• Subtract.

• Turn them to IMPROPER FRACTIONS!

• Find common denominators.

When DIVIDING FRACTIONS ...

• Add the fractions.

• Get a common denominator.

• Keep the 1st fraction, Change to multiplication, and Flip the 2nd fraction to its reciprocal.

• Subtract the fractions.

When MULTIPLYING FRACTIONS...

• You MUST get a common denominator.

• Multiply across the top, multiply across the bottom.

• Add the fractions.

• Subtract the fractions.

Multiplication or division word problem? Wayne has a hot dog stand open all summer. On Wednesday, he used 2/3 a bag of hot dog buns. On Thursday, he used 4/5 as many hot dog buns. How many bags of hot dog buns did Wayne use on Thursday?

• Multiplication

• Division

On Wednesday, a team of students cleaned 1/5 of a city block. On Thursday, the team cleaned 2 ¹/₂ as many blocks as on Wednesday. How many city blocks did the students clean on Thursday?

• Multiplication

• Division

Multiplication or division word problem? A mother makes 1/2 of a pound of white fudge. She divides the fudge into three equal containers. How much fudge does she put in each container?

• Multiplication

• Division

How many hamburgers are there?

• 10 hamburgers

• 2/20 hamburgers

• 8 hamburgers

• 14 hamburgers

Rosemary ran 2/3 of mile.

Sophie ran 3 times as far. How far did Sophie run?

• 6/3 miles

• 2 miles

• 3 miles

• 4 miles

A recipe needs 3/4 cup of sugar. If the recipe is doubled, how much sugar is needed?

• 1

• 1 1/2

• 1  3/4 

• 2

In which of the following equations below does y = 4? Select ALL that apply

• 1/y x 3/5 = 3/20

• 3/5 x y/5 = 7/25

• 1/2 x 1/2 = 1/y

• 2/5 x 2/3= y/15