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1/3

To review the statement that reducing

a

fraction does NOT change its value:

16/32 has the same value as 8/16 or as 4/8

or

16/32 = 8/16 = 4/8 = 1/2

Remember to reduce

all

fractions

to

their

LOWEST terms.

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1/4 + 1/2 = ****

In order to add fractions, you must find a

number into which the denominators will

divide. This is called a COMMON DENOMINATOR.

The number into which the denominators of all

fractions to be added will divide is the

_______________ _______________.

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1/4 + 1/2 = ****

To find the common denominator, we try the

common denominator

inspection method first.

By inspecting the

problem, we notice that there are many numbers

(such as 4, 8, 16, 4000, etc.) into which both

denominators will divide.

However, we want

the smallest of these numbers, to simplify

working the problem. This number, called the

lowest common denominator or l.c.d., is

_______________.

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