Addition and Subtraction of Fractions 7-1
The properties of addition and subtraction of whole numbers also apply to fractions.
When adding fractions with the same denominator-- simply add the numerators and place them over the denominator.
That is 5/9 + 2/9 = (5+2)/9 = 7/9
In order to add two fractions with different denominators, find two fractions with a common denominator, equivalent to the given fractions. The most convenient denominator is the least common multiple of the denominator which is called the least common denominator (LCD)
When solving equations such as
n + 1/2 = 5/6 Use the same method taught for intetergs. DO unto one side that what you do to the other
so if n + 1/2 = 5/6 You must subtract 1/2 from both sides!!
n = 5/6 - 1/2
Stack your fractions. change to a LCD and subtract
n = 1/3
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