1. Dividing Fractions
SPI Solve problems involving multiplication and division of fractions.
SPI Solve multi-step arithmetic problems using fractions, mixed numbers, and decimals.
Brainpop over x and dividing fractions

2. Multiply. Write each answer in simplest form.
Warm Up
Multiply. Write each answer in simplest form.
3) • 3 1 2 __

3. Dividing Number
What does this mean?
20 ÷ 5 =

4. Reciprocals can help you divide by fractions
Reciprocals can help you divide by fractions. Two numbers are reciprocals if their product is 1.

5. Find the reciprocal. 1 9 __ 1 9 __ 1 9 __ • = 1
• = 1
Think: of what number is 1? 1 9 __ 1 9 __
• 9 = 1 1 9 __ 9 1 __
of is 1. 1 9 __
The reciprocal of is 9.

6. Find the reciprocal. 2 3 __ 2 3 __ • = 1 2 3 __
• = 1 2 3 __
Think: of what number is 1? 2 3 __ 3 2 __ 6 __ 2 3 __ 3 2 __
• = = 1
of is 1. 2 3 __ 3 2 __
The reciprocal of is .

7. So what is the process? KCF K – KEEP first fraction the same
C – CHANGE division sign to multiplication
F – FLIP the second fraction over (find the reciprocal)
*if any mixed # or whole #’s make them improper fractions before you begin

8. What does it mean to divide 2 fractions???
Dividing Fractions
What does it mean to divide 2 fractions???

9. Divide. Write each answer in simplest form.8 7 __
÷ 7 8 7 __
Rewrite as multiplication using the
reciprocal of 7, 1 7 __ 8 7 __ 1 7 __
÷ 7 = •
8 • 1
7 • 7
____ =
Multiply by the reciprocal. 8 49 __ =
The answer is in simplest form.

10. 2 ÷ 1 3 4 __ 1 12 __ Write the mixed numbers as
2 ÷ 1
Write the mixed numbers as
improper fractions =
and = 3 4 __ 1 12 __ 11 4 __ 13 12 __ 3 4 __ 11 4 __
2 ÷ = ÷ 1 12 __ 13 12 __ 11 4 __ 12 13 __ =
Rewrite as multiplication. • 3
11 • 12
4 • 13
______ =
Simplify before multiplying. 1 33 13 __ =
Multiply. 7 13 __
You can write the answer as a mixed number.
= 2

11. More examples Dividing Fractions for white boards

12. Divide. Write each answer in simplest form. 3. ÷ 20 4. 3 ÷ 2
Find the reciprocal.
Divide. Write each answer in simplest form.
÷ ÷ 2
5. Rhonda put 2 pounds of pecans into a -pound bag. How many bags did Rhonda fill? 1 11 __ 11 1 __ 8 13 __
13 8 __ 1 2 __ 1 2 __ 7 5 __ 2 5 __ 4 7 __ 1 35 __
, or 1 3 4 __ 1 4 __
11 bags