# Fractions and Decimals Everywhere! - PowerPoint PPT Presentation

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## Fractions and Decimals Everywhere!

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### Correctly divide fractions and mixed numbers Use cross cancellation to simplify fractions before multiplying them Vocabulary ... Write each answer in simplest form. – PowerPoint PPT presentation

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Title: Fractions and Decimals Everywhere!

1
Fractions and Decimals Everywhere!
2
Mrs. Atkinson had 4 pizzas that she divided in
half. How many pieces of pizza did she have
then?Show the math and solve it.
•

3
What am I Learning Today?
• Dividing Fractions

How will I show that I learned it?
Correctly divide fractions and mixed numbers Use
cross cancellation to simplify fractions before
multiplying them
4
Vocabulary
• Reciprocal The flipped version of a fraction,
where the denominator is now the numerator and
the numerator is now the denominator

5
Questions
How do I divide fractions?
1. Rewrite the first fraction exactly as it is.
2. Change the operation to multiplication.
3. Write the inverse or reciprocal of the second
fraction.
4. Multiply the numerators.
5. Multiply the denominators.
6. Simplify.

How do I divide mixed numbers?
1. Change the mixed numbers to improper fractions.
2. Follow the same steps for dividing fractions.

6
Using Reciprocals to Divide Fractions Divide.
Write each answer in simplest form.
7
7

Multiply by the reciprocal.

The answer is in simplest form.
7
Using Reciprocals to Divide Mixed Numbers
2 1
Write the mixed numbers as improper fractions. 2
and 1
2 1
Rewrite as multiplication.

3

Simplify before multiplying.
1
Multiply.

You can write the answer as a mixed number.
2
8
Questions
What is an easy way to remember the steps for
dividing fractions?
Keep it, change it, flip it KEEP the first
fraction the same CHANGE to multiplication FLIP
the second fraction
How can I simplify fractions before multiplying
them?
Use cross cancellation
9
Using Cross Cancellation
3 1
Write the mixed numbers as improper fractions. 3
and 1 .
3 1
Rewrite as multiplication.

3

Simplify before multiplying.
1
Multiply.

You can write the answer as a mixed number.
3
10
Now Try These!
Find the reciprocal. 1. 2. Divide. Write
each answer in simplest form. 3. 20 4. 3
2 5. Rhonda put 2 pounds of pecans into
a -pound bag. How many bags did Rhonda
fill?
, or 1
11 bags