Adding & Subtracting Fractions 6-5
In chapter 2 Section 9 we reviewed adding and subtracting
fractions.
With that we found we could do the reverse….
To add or subtract fractions with the same denominator, you
add or subtract their numerators and write that results over the common
denominator.
To simplify an expression involving fractions, you write it as
a single fraction in simplest form
3c/16 + 5c/16 = 8c/16 = c/2
Be careful when you distribute the subtraction sign to every
term in the 2nd fraction.
The following really seems simple but many students try to
simplify it… BE CAREFUL
STOP! You can not
simplify any farther!
Notice that 3-x = -( x - 3) , the LCD is x – 3
Simplify
You must determine the LCD first. Rewrite the fractions using
the LCD of 36
Simplify:
Simplify:
Factor completely FIRST
You realize that the LCD is a(a-2)(a+2)
No comments:
Post a Comment