1. Aim: How do we divide fractions?
October 17, 2012
Aim: How do we divide fractions?
Do-Now: 1. What is the S.O.S. method for multiplying fractions? (Use the notes from yesterday.)
2. Give an example with the steps of the S.O.S. method.

2. To Divide Fractions:
Rewrite the first fraction. (SHAPE: whole to fraction/ mixed # to improper)
Change the division sign to a multiplication sign.
Flip the second fraction upside down.
Multiply.

3. Reciprocal
When you flip the second fraction, you are writing that fraction’s reciprocal. 3 5 5 3

4. Example 1 1 1 ÷ 2 3
Rewrite: 1 2 2 x = 1 3 3

5. Example 2 4 4 ÷ 5 9
Rewrite: 1 4 9 9 4 1 x = = 4 1 5 5 5

6. Example 3 12 3 ÷ 5 1
Rewrite: 20 4 12 5 20 x = = 1 1 3 1

7. Example 4 1 2 ÷ 6 1
Rewrite: 1 1 1 x = 6 2 12