# Fraction Review

** Adding and Subracting Fractions**

To add and subtract fractions one must first find the ** Least Common
Denominator (LCD)**

For example the LCD of and
is 15. To get
to have the same denominator we must

multiply the numerator and denominator of by
3. So that we have . Now we can add

together and
. We get that:

Example:

The LCD of 6 and 8 is 24. Therefore multiply the numerator and denominator of
by 4 and

multiply the numerator and denominator of by
3. So now we have:

Remember: A whole number , x, can be represented as
. (i.e.:
)

Problems

**Multiplying and Dividing Fractions **

To multiply fractions one needs to multiply the numerators together and the
denominators

together:

Example:

To divide fractions one must take the reciprocal of the
fraction in the denominator and then

multiply the fractions .

Example:

Problems: For 1 thru 5 just solve and simplify . For 6 thru 10 solve for x and simplify.

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