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5-6a Add Subtract Fractions.ppt - Wikispaces

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5-6a Add Subtract Fractions.ppt - Wikispaces Powered By Docstoc
					Add and Subtract
Fractions

Honors Math – Grade 6
Problem of the Day




What are the important facts?

To find the greatest number of
equal groupings, find the greatest
common factor of 18 and 24.
RECALL
To add fractions with unlike denominators…
1. Find LCD
2. Make equivalents
3. Add numerators.
To add fractions with unlike
denominators…

1. Find the LCD of the fractions.

2. Rename one or both fractions
   using the LCD (equivalents).

3. Add. Express the sum in lowest
   terms.
                    Add with Unlike Denominators, Like Signs.




To add fractions with like signs…add normally. The sign of the
sum is the same as the sign of the addends.
                   Add with Unlike Denominators, Unlike Signs.




To add fractions with unlike signs…SUBTRACT!! The sign of the
sum is the same as the addend with the greater absolute value.
Add.
                   Subtract with Like & Unlike Denominators.




To subtract signed fractions…change subtraction to addition of the
opposite.
                   Subtract.




To subtract signed fractions…change subtraction to addition of the
opposite.

				
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posted:3/23/2013
language:English
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