10/3 Multiplying and Dividing Fractions

Multiplying Fractions
Write this in your notebooks!

Step 1: Multiply the numerators. Multiply the denominators.
Step 2: Simplify.

Multiple Choice

To multiply two fractions...

• multiply the numerators and keep the denominators constant.
• multiply the numerators and multiply the denominators.
• keep the numerators constant and multiply the denominators.
• guess and check.

Multiple Choice

Find the product.  Then, simplify.

• 2/24
• 3/24
• 1/12
• 3/16

Multiple Choice

George has 1/3 pan of brownies. He eats 1/4 of them. What fraction did George eat?

• 1/7
• 1/4
• 1/3
• 1/12

Multiple Choice

1/2 x 3/4 (simplify if needed)

• 3/8
• 3/4
• 4/6
• 3/2

Multiple Choice

4/9  x  2/3 =

• 6/12
• 8/27
• 1/2
• 6/27

Multiple Choice

5/6  x  1/2 =

• 5/6
• 6/12
• 5/12
• 1/2

Multiple Choice

7/9  x  1/2  =

• 7/18
• 14/9
• 8/11
• 1  5/9

Multiple Choice

How many black cat cookies are hiding in this picture?

• Two (2)

• Three (3)

• Four (4)

• Five (5)

Dividing Fractions
Write this in your notebooks!

Keep, Change, Flip

1. Keep the first fraction.

2. Change the sign to multiplication.

3. Flip the second fraction (reciprocal).

Multiple Choice

What is the rule for dividing fractions?

• keep, change, opposite

• keep, change, flip (reciprocal)

• keep, keep, change

• keep, keep, opposite

Poll

$$What\ is\ the\ first\ step\ in\ solving\ \frac{3}{7}\div\frac{2}{5}$$  

• change 3/7 to 7/3

• keep 3/7

• change 2/5 to 5/2

Multiple Choice

Question 7

$$\frac{2}{5}\div\frac{2}{5}$$  

• $$\frac{4}{25}$$  

• $$5$$  

• $$1$$  

• $$\frac{2}{5}$$  

Multiple Choice

What is the recriprocal of 4/5

• 4/5
• 5/4
• 5/1
• 1/5

Multiple Choice

⁴/₉  ÷  ¹/₂

• ⁸/₉
• ⁵/₁₁
• ⁶/₁₀
• ⁴/₁₈

Multiple Choice

What does KCF stand for?

• Keep change flip

• Keep change forever

• Kid can flip

• Keep change flick

Multiple Choice

How would you flip the numbers when dividing a fraction?

• Swap the numerator with the denominator

• Swap the denominator with the other fractions denominator

• Swap The numerator with the other fractions numerator.

• Swap The denominator with the other fractions numerator.

Multiple Choice

Divide these fractions

• 8 / 9

• 6/12

• 6 / 6

• 1/2

Multiple Choice

¹/₄  ÷  ²/₅

• ⁵/₈
• 2/20
• ¹/₁₀
• ³/₉

Multiple Choice

Who is this?

• Captain Clump

• Captain Jack Sparrow

• Captain Picard

• Captain Crunch

Multiple Choice

1 2/3

• Improper fraction

• Mixed number

Multiple Choice

$$\frac{1}{6}$$  +  $$\frac{17}{\text{24}}$$  =

Answer should be in simplest form.

• $$\frac{21}{24}$$  

• $$\frac{18}{24}$$  

• $$\frac{7}{8}$$  

Fill in the Blanks

What is the LCM of 2, 6, 8 and 12?

Multiple Choice

How many eyeballs are in this picture?

• Four (4)

• Five (5)

• Six (6)

• Seven (7)

Multiple Choice

Why did the skeleton NOT go to the dance?

• Because he had NO BODY to go with

• He didn't have a ride

Multiple Choice

Who is this?

• Jason

• Friday the 13th

• Freddy Kruger

• Nightmare on Elm Street

Multiple Choice

Find the LCM of 36, 54

• 18

• 110

• 36

• 108

Multiple Choice

$$\frac{1}{2\ }\ \ -\ \frac{3}{10\ }\ \ =$$  
Answer should be in simplest form.

• $$\frac{2}{10}$$  

• $$\frac{1}{5}$$  

• $$\frac{4}{10}$$  

Multiple Choice

Black cats crossing your path on Halloween means ________.

• Bad luck

• Good luck