dividing fractions 2-3 dividing fractions. pod – multiplying fractions

Dividing Fractions

2-3 Dividing Fractions

POD – Multiplying Fractions

7

2

4

3) a

21

14

2

12) b

Dividing Fractions vs. Multiplying

Pizza – what is ½ of 2½ pizzas?

Dividing Fractions vs. Multiplying

What is 2½ pizzas divided into 2?

Dividing = Multiplying by the Reciprocal

Same problems! Dividing = Multiplying by Reciprocal…

What is Reciprocal?

Reciprocal – flipping fraction

Switch Numerator and Denominator (top and bottom)

If starting with a whole number (7), put it over 1

And then flip it!

1

7

7

1

Practice

Find the reciprocal of each number…

Always leave reciprocal as improper fraction

5

3

8

12

21

14

23

11

How do we put this all back together?

Dividing = multiplying by the reciprocal

5

3

2

1 l)(reciproca

3

5

2

1

8

5

4

3

Practice with your neighbor…

Please find the following quotients (answers to division statements)

8

5

7

3

6

4

8

12

What happens when you have a negative?

7

33

7

4

Tips for Dividing

Copy, change, flip Keep… Only cancel AFTER you flip Make sure you change from dividing

to multiplying when you flip

Reflection Question…

How are multiplying and dividing fractions connected? How are they similar? How are they different?

Where do you think students would be most likely to make a mistake while dividing?

Use letter, numbers, symbols, words, ANYTHING you need to explain your thinking!