1. Warm Up Problem
What is the area of a picture frame whose length is inches and width is inches?
A) square inches C) square inches
B) square inches D) square inches

2. Divide Whole Numbers by Fractions
Lesson 4-6

3. Objectives I can define and find the reciprocal of a number.
I can divide a whole number by a fraction.

4. Vocabulary Reciprocal – any two numbers with the product of 1 Example:
So, the reciprocal of is
In other words “FLIP FLOP” the fraction!

5. It’s okay if the final answer is an improper fraction.
Example 1
Find the reciprocal of 2 3
Since 2 3 x = , the reciprocal is
It’s okay if the final answer is an improper fraction.

6. Example 2
Find the reciprocal of
Flip flop: or 8

7. Example 3 Find the reciprocal of 5. 5 x 1 5 = 1
So the reciprocal of 5 is

8. Got It?
Find the reciprocal of each number.
1) 3 4
2) 1 3
3) 11

9. Example 4
Find 2 ÷
Multiply by the reciprocal (aka Flip Flop Multiplop)
2 1 x = or 6
Model it:
1 3

10. Example 5

11. Got It?
4) 6 ÷ 1 3
5) 5 ÷ 2 3
6) 4 ÷ 3 4

12. Example 6
At summer camp, the duration of a field hockey game is 3 4 hour. The camp counselors have set aside 6 hours for field hockey games. How many games can by played? 6 ÷ 3 4 = 6 1 x x = 8 1 or 8 games

13. Got It?
A neighborhood development that is 4 acres is to be divided into acre lots. How many lots can be created?