Divide a Whole Number by a Fraction

Divide a Whole Number by a Fraction

Poll

Let's think about this.

 $3\ \div\ \frac{1}{4}\$  
What is that equal to?  Draw a picture, then choose your answer.
Hint: Take 3 wholes and divide each into 4 pieces.  How many pieces do you have?

• 7

• 12

•  $\frac{1}{12}$  

• I don't know how to solve this.

Let's do this together.

Multiple Choice

4 ÷ ½ = _

• 4
• 2
• 16
• 8

Open Ended

Let's try a word problem.

Jason has 2 cups of muffin batter. It takes

 $\frac{1}{4}$  cup of batter to make one muffin.  How many muffins can Jason make with 2 cups of batter?

Draw a picture, then explain how you soved it.

Multiple Choice

A cooking teacher divides 4 pounds of flour evenly among all her students. Each student gets 1/4 pounds of flour. How many students are in the class?

• 1
• 4
• 16
• 20

Divide Fractions Using the Reciprocal

• Flip the second fraction (that's the reciprocal fraction)

• Multiply across

Multiple Choice

Find the reciprocal of 8

• 2/4

• 8

• 1/8

Multiple Choice

Find the reciprocal of 1/10

• 2/5

• 10

• 1/5

Pause and work together.

Keep this tab open! :)

Multiple Choice

Joy had 15 pounds of birdseed. She fed her birds

 $\frac{1}{5}$  lb. of birdseed every day until all the birdseed was gone.
For how many days did Joy feed the birdseed to her birds?

• 20 days

• 3 days

• 90 days

• 75 days