Learning Target: I can use models to divide whole numbers by fractions.

Divide Whole Numbers by Fractions

Example

Find 9  .

Step 1:  Draw 9 wholes.

Step 2:  Separate each whole into thirds.

Step 3:  Count how many thirds are in 9 wholes.

9 × 3 = 27

9    =  27

Let's Practice Together

Write the equation represented by each model using a whole number and a unit fraction.

Write the answer in simplest form.

1.  Marc ordered 2 pizzas.  Each one was cut into eighths.  How many slices are there in all?

2.  Divide:

10 ÷

Your Turn

3.  Three friends want to share 4 pies evenly.  They cut each pie into thirds.  How many slices of pie are there?

4.  Three spinners are on a table.  Each spinner is cut into fifths.  How many combined sections are there on the spinners?

5.  A cheese maker made six wheels of cheese.  He cut them into quarters to make wedges.  How many wedges does he have?

Divide.

Check your answers by multiplying.

6. 

18 ÷ 

7.

12  ÷ 

8. 

10 ÷

Check for Understanding

1.  Kerry has a bottle filled with 8 cups of orange juice. She pours it into several small glasses, each of which hold cup. How many glasses does Kerry fill?

Answers

1.  16

2.  40

3.  12

4.  15

5.  24

6.  108

7.  36

8.  50

Check for Understanding

1.  32