12/1 Fraction Operation Practice

12/1 Fraction Operation Practice

Please show all work in your math notebook.

Let's Discuss...

• Auggie baked a batch of cookies. Only 1/3 of the batch was left after dinner. The next day, Auggie took 1/2 of the leftover cookies to school. What fraction of the original batch did he take to school?

Multiple Choice

1.  Auggie baked a batch of cookies. Only 1/3 of the batch was left after dinner. The next day, Auggie took 1/2 of the leftover cookies to school. What fraction of the original batch did he take to school?

• $\frac{1}{2}\ \times\ \frac{1}{3}\ =\ \frac{1}{6}$

• $\frac{1}{2}\ \times\ \frac{1}{3}=\frac{1}{5}$

• $\frac{1}{2}\ -\ \frac{1}{3}=\frac{1}{6}$

• $\frac{1}{3}\ -\frac{1}{2}\ =\ \frac{0}{1}$

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Justin is working on projects that require 3 1/2 yards of ribbon per project. Justin has 28 yards of ribbon. What is the maximum amount of projects that Justin can finish with this amount of ribbon?

Multiple Choice

2. Justin is working on projects that require 3 1/2 yards of ribbon per project. Justin has a total of 28 yards of ribbon. What is the maximum amount of projects that Justin can finish with this amount of ribbon?

• 
  

  $28\ -\ 3\ \frac{\text{1}}{\text{2}}\ =\ 24\ \frac{1}{2}\$ ; 24 projects

• $28\ -\ 3\ \frac{1}{2}=8$ projects

• $3\ \frac{1}{2}\ \div28\ =\frac{1}{8}\$ of a project

• $28\ \times\ 3\ \frac{1}{2}\ =98\$ projects

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Liam made 40 cookies for an upcoming bake sale. 3/5 of the cookies were chocolate chip and 1/4 of the cookies are peanut butter. HOW MANY chocolate chip and peanut butter cookies are there all together?

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This week, Roman spent  $1\ \frac{1}{3}$    hours studying for math,  $\frac{2}{3}$   of an hour studying for science, and   $\frac{3}{4}$  of an hour studying for social studies. How many hours did he spend studying this week?

Multiple Choice

4.This week, Roman spent  $1\ \frac{1}{3}$    hours studying for math,  $\frac{2}{3}$   of an hour studying for science, and   $\frac{3}{4}$  of an hour studying for social studies. How many hours did he spend studying this week?

• Addition,

  $1\ \frac{6}{10}$ hours

• Subtraction,
  
  $\frac{1}{12}$ hours

• Addition,
  $2\ \frac{3}{4}$ hours
  

• Multiplication
  $2\$ hours
  

Let's Discuss...

Eli has  $2\ \frac{1}{2}$   cups of chocolate chips. If he makes 20 cookies with an equal amount of chocolate chips, how many cups of chocolate chips will each cookie use?

Multiple Choice

5. Eli has  $2\ \frac{1}{2}$   cups of chocolate chips. If he makes 20 cookies with an equal amount of chocolate chips, how many cups of chocolate chips will each cookie use?

• Subtraction
  
  $20\ -\ 2\ \frac{1}{2}\ =\ 17\ \frac{1}{2}$ cups of chips

• Division
  
  $20\ \div2\ \frac{1}{2}\ =$ 8 chips
  

• Division
  
  $2\ \frac{1}{2}\ \div\ 20\ =\ \frac{1}{8}$ cups of chips

• Multiplication
  
  $20\ \times\ 2\ \frac{1}{2}\ =50$ chips
  

Let's Discuss...

A baker is making cakes for a big party. She uses 1/4 cup of oil for each cake. How many cakes can she make if she has a bottle of oil that has 6 cups in it?

Multiple Choice

6. A baker is making cakes for a big party. She uses 1/4 cup of oil for each cake. How many cakes can she make if she has a bottle of oil that has 6 cups in it?

• $\frac{1}{4}\times6\ =\ 1\ \frac{1}{2}$

• $6\ -\ \frac{1}{4}\ =5\ \frac{3}{4}$

• $\frac{1}{4}\ +\ 6\ =\ 6\ \frac{1}{4}$

• $6\ \div\frac{1}{4}=\ 24$

Let's Discuss...

Keith ate 3/5 of an orange, while Dan ate 1/4 of a orange. Dan also ate 1/2 of an apple. In total, how much orange did the two eat?

Multiple Choice

7. Keith ate 3/5 of an orange, while Dan ate 1/4 of a orange. Dan also ate 1/2 of an apple. In total, how much orange did the two eat?

• $\frac{3}{20}$

• $\frac{17}{20}$

• $\frac{7}{20}$

• $2\ \frac{2}{5}$

Let's Discuss...

There was 5/8 of a pie left in the fridge. Daniel ate 1/4 of the leftover pie. How much of a pie did he have? 

Multiple Choice

8. There was 5/8 of a pie left in the fridge. Daniel ate 1/4 of the leftover pie. How much of a pie did he have?

• $\frac{5}{32}$

• $\frac{3}{8}$

• $\frac{4}{10}$

• $\frac{7}{8}$

Let's Discuss...

Jamal’s mother made 1/3 of a pound of his favorite fudge, peanut butter caramel fudge. She divided the fudge into 4 equal containers. How much fudge did she put in each container?

Multiple Choice

9. Jamal’s mother made 1/3 of a pound of his favorite fudge, peanut butter caramel fudge. She divided the fudge into 4 equal containers. How much fudge did she put in each container?

• $1\ \frac{1}{3}$ pounds

• $4\ \frac{1}{3}$ pounds

• $2\ \frac{2}{3}$ pounds

• $\frac{1}{12}$ pounds