Multiply Fractions x Fractions

Multiply Fractions x Fractions

To multiply fractions, you multiply straight across!

• Numerator x Numerator

• Denominator x Denominator

No common denominators needed!!

Multiply a part x a part.

Remember "Of" means multiply!

You can use models to illustrate multiplication just like we did with decimals.

• Purple represents 2/5

• Orange represents 3/10

• Pink represents the product (answer) because it is 2/5 "of" 3/10

Multiply a part x a part.

Every time you multiply by a fraction LESS THAN 1, the product will get SMALLER...just like decimals!

• Green represents 1/2

• Yellow represents 1/4

• The striped section represents the product (answer) with is 1/2 "of" 1/4

Multiple Choice

This model shows

$$\frac{1}{4}\times$$  

1/4 is horizontal and the other fraction is vertical.

• $$\frac{3}{8}$$  

• $$\frac{5}{8}$$  

• $$\frac{1}{4}$$  

Multiple Choice

$$\frac{1}{2}\times\frac{1}{8}=$$  

The green striped area is the product (answer).

• $$\frac{1}{4}$$  

• $$\frac{1}{16}$$  

• $$\frac{2}{16}$$  

Multiple Choice

$$\frac{1}{4}\times\ \frac{1}{3}=$$  

• $$\frac{2}{12}$$  

• $$\frac{1}{12}$$  

• $$\frac{6}{12}$$  

Multiple Choice

Find the product.

• 2/14

• 1/49

• 2/7

• 1/14

Multiple Choice

Sometimes you will see a dot instead of a multiplication symbol. This is another way to show multiplication.

• 11/14

• 12/21

• 21/40

• 28/30

Multiple Choice

• 3/40

• 4/40

• 3/5

• 5/24

Math Response

Find the product: $$\frac{2}{8}\times\frac{1}{2}=$$  

Type answer here

Correct Answer: \frac{2}{16}

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Math Response

Find the product: $$\frac{3}{9}\ of\ \frac{1}{4}=$$  

Type answer here

Correct Answer: \frac{3}{36}

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Multiple Choice

Find the product: $$\frac{2}{9}\times5$$  

• $$\frac{2}{45}$$

• $$1\frac{3}{4}$$

• $$\frac{10}{45}$$

• $$1\frac{1}{9}$$

Math Response

Find the product: $$\frac{4}{8}\times\frac{2}{8}$$  

Type answer here

Correct Answer: \frac{8}{64}

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Math Response

$$\frac{2}{5}$$ of $$\frac{4}{10}$$

Type answer here

Correct Answer: \frac{8}{50}

Deg^°

Rad