Checkpoint: Dividing Rational Numbers

Select the choices with TRUE statements

• 
  

   $3\div5\ =\ \frac{3}{5}$   $17\div13\ =\ \frac{13}{17}$  
  

•  $3\div5\ =\ \frac{5}{3}$   $17\div13\ =\ \frac{17}{13}$  

•  $3\div5\ =\ \frac{3}{5}$   $17\div13=\frac{17}{13}$  

•  $3\div5\ =\ \frac{5}{3}$   $17\div13=\frac{13}{17}$  

In honor of National Pizza day, 10 students shared 3 large pizzas. If they wanted to share them equally, select the problems they could use to find how much each will have.

Select all that apply

•  $\frac{10}{3}$  

•  $\frac{3}{10}$  

• 
• 

Answer explanation

February 9th is National Pizza Day. Who knew?!?!

A number divided by zero is....

• zero

• the number itself

• an undefined operation

Zero divided by a number is...

• zero

• the number itself

• an undefined operation

Select all true statements

• $-\frac{5}{\ 6\ }=\ \frac{-5}{\ \ 6}=\frac{-5}{-6}$

• $-\frac{5}{6}=\frac{-5}{\ \ 6}=\frac{\ \ \ 5}{-6}$

• $\frac{-5}{-6}=\frac{5}{6}$

Select all of the ways to show or think about

 $1\ \frac{1}{4}\ \div\ \frac{3}{8}$  

• How many 3/8's are in 1 1/4?

•  $\frac{\frac{5}{4}}{\frac{3}{8}}$  
  

• 
•  $3\ \frac{1}{3}$  

If using the Identity Property of Multiplication, what is the "Super Giant 1" you would use to divide  $1\ \frac{5}{8}\div\frac{1}{4}$  

•  $\frac{\frac{8}{5}}{\frac{8}{5}}$  

•  $\frac{\frac{4}{1}}{\frac{4}{1}}$  

•  $\frac{\frac{1}{4}}{\frac{1}{4}}$  

•  $\frac{\frac{13}{8}}{\frac{13}{8}}$  

You have 2/4 of a pizza and you want to share it equally between 2 people. How much of the pizza does each person get?

• Each person gets 1⁄4 of a pizza.
• Each person gets 2/3 of a pizza.
• Each person gets 1⁄5 of a 
• Each person gets 1⁄8 of a pizza.

Tags

CCSS.5.NF.B.3

CCSS.5.NF.B.7

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?

• She can make 13 cakes.
• She can make 4 cakes.
• She can make 24 cakes.
• She can make 34 cakes.

Tags

CCSS.5.NF.B.7B

CCSS.5.NF.B.7C

 $2\ \frac{3}{5}\div\frac{3}{10}=\ 8\ \frac{2}{3}$  Select the steps that show using the "invert and multiply" algorithm for division

•  $2\ \frac{3}{5}\div\frac{3}{10}=\frac{13}{5}\div\frac{3}{10}=\ \frac{13}{5}\times\frac{3}{10}=\ \frac{130}{15}=\ 8\ \frac{2}{3}$  
  
  

•  $2\ \frac{3}{5}\div\frac{3}{10}=\frac{13}{5}\div\frac{3}{10}\ =\ \frac{5}{13}\times\frac{3}{10}=\frac{15}{130}=8\ \frac{2}{3}$  

•  $2\ \frac{3}{5}\div\frac{3}{10}=\ \frac{13}{5}\div\frac{3}{10}\ =\ \frac{13}{5}\times\frac{10}{3}=\ \frac{130}{15}=8\ \frac{2}{3}$  

•  $2\ \frac{3}{5\ }\div\frac{3}{10}=2\ \frac{3}{5}\times\frac{10}{3}=2\ \frac{30}{15}=8\ \frac{2}{3}$