Multiplying and Dividing Fractions

Presentation

•

Mathematics

•

6th Grade

•

Hard

James Gonzalez

FREE Resource

3 Slides • 14 Questions

Multiplying Fractions

This is the easy one. If fact, you've already done it when you were adding fractions and finding a common denominator.

When multiplying fractions, just multiply straight across. Numerator times numerator. Denominator times denominator. That's it.

Multiple Choice

What's the rule for multiplying fractions?

Just multiply straight across.

Keep, Change, Flip

You must have a common denominator

Multiple Choice

Find the product.

2/14

1/49

2/7

1/14

Multiple Choice

Find the product.

9/24

9/28

6/32

1/28

Multiple Choice

$\frac{1}{2}\times\frac{4}{5}$

$\frac{4}{10}$

$\frac{5}{7}$

Multiple Select

Find the product.

3/50

30/5

1 1/5

Multiple Choice

$\frac{1}{2}\ \times\ \frac{3}{5}\ =$ Multiply and write in simplest form.

$\frac{5}{6}$

$\frac{-5}{6}$

$\frac{3}{10}$

$\frac{-3}{10}$

Poll

How do you feel about multiplying fractions?

Great (it's pretty easy)

Horrible (I'm so lost)

Eh... it's okay.

Dividing Fractions

Rule#1 for Dividing Fractions: DON'T DIVIDE.

Instead of dividing you do this procedure:

KEEP, CHANGE, FLIP

Remember, you are MULTIPLYING the first fraction by the RECIPROCAL of the second fraction.

Dividing Fractions

Multiple Choice

After I "Keep, Change, Flip" what equation would I have? $\frac{1}{2}\div\frac{2}{5}$

$\frac{2}{1}\times\frac{2}{5}$

$\frac{1}{2}\times\frac{5}{2}$

Multiple Choice

Solve $\frac{1}{2}\div\frac{2}{5}$

$\frac{4}{5}$

$\frac{5}{4}$

$\frac{2}{10}$

Multiple Choice

Solve:

$\frac{1}{10}\div\frac{2}{3}$

$\frac{3}{20}$

$\frac{2}{30}$

Multiple Choice

Solve

$\frac{3}{4}\div\frac{1}{2}$

$\frac{5}{4}$

$\frac{3}{8}$

$\frac{6}{4}$

Multiple Choice

Solve:

-9/10

10/9

9/10

6/8

Multiple Choice

Solve.

$\frac{6}{40}$

$\frac{3}{4}$

$\frac{1}{2}$

$\frac{12}{20}$

Poll

How do you feel about dividing fractions?

Great (it's pretty easy)

Horrible (I'm so lost)

Eh... it's okay.

Multiplying Fractions

This is the easy one. If fact, you've already done it when you were adding fractions and finding a common denominator.

When multiplying fractions, just multiply straight across. Numerator times numerator. Denominator times denominator. That's it.

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