#### Transcript of Multiplying and Dividing Fractions

Try and solve:

1 1/3 x 2 1/2

Quiz Time!!!

**Multiplying and Dividing Fractions**

Table of Contents

About Fractions

Why do we use them?

Multiplying Whole Fractions

Dividing Whole Fractions

Multiplying Mixed Numbers

Dividing Mixed Numbers

Jeopardy!!

About Fractions

Fractions are a representation of a part of a whole

Multiplying Whole Numbers

Multiplying Whole Numbers are very simple.

Example: 2 x 2/4

~ 2= 2/2

~ Multiply the numerators ( 2x2 )

~Multiply the denominators ( 2x4)

~Result:

2x2= 4

2x4= 8

4/8

Why do we use fractions?

we use fractions when cutting or splitting things into portions.

we also use portions in companies when you own a share of e.x. a hats making company.

You can use it in money as well. Fractions are everywhere!

Dividing Whole Fractions

Multiplying Mixed Numbers

Review

convert whole numbers into improper fractions by multiplying the whole number by the denominator

multiply denominators together, and numerators together

see if you can simplify the answer, by finding the LCM (lowest common multiple)

after you can't simplify any more, turn the improper fraction into a mixed number.

Dividing Mixed Numbers

Multiply the bottom number of the fraction by the whole number

Simplify the fraction

8/10 / 5

10x5=50

8/50

4/25

Try and solve these questions! Remember to simplify.

a). 4x 3/4=

b). 8x 9/10=

c). 2x 1/5=

quiz time

3/30 / 5 =

4/5 / 2 =

4/18 / 14 =

You need to know how convert a mixed fraction into a improper fraction

Multiply by the reciprocal of the divisor

Simplify the fraction

Quiz Time

answer:

18 2/6

simplified to 18 1/3

3 1/3 / 2 3/5 = ?

3 1/3 / 2 5/3 =?

2 1/2 / 3 2/5 =?

3 4/2 / 1 6/8 =?

GAME TIME!

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