# Zach

Document Sample

```					Adding and Subtracting Fractions

By
Denominators                  4
b.With Unlike Denominators            5

2.Subtracting Fractions              6
a.With Like Denominators             7
b.With Unlike Denominators           8
c.Regroup and Rename                 9
pg. 2
• When there are like denominators,
ex:
all you do is add the numerators.
• Keep the denominator the same.
Simplify if needed.                   4
7    6
2
+ 7
6
7        pg. 4
• When the fractions have unlike
denominators, find a common
ex:
denominator by finding the Least
Common Multiple(LCM).
3 x3 9
• Multiply the numerator of each fraction
by the same number you multiply the         8 x3 24
denominator to get the common
3 x4 12
denominator.
• Add. Simplify if needed.                  + 6 x4 + 24
21   7
24   8   pg. 5
Subtracting Fractions: With Like
Denominators
• Subtracting fractions with like      ex:
fractions with like denominators,
except you subtract instead of        7
• Subtract the numerators. Simplify     3
if needed.
- 8
4    1
8    2   pg. 6
Subtracting Fractions: With Unlike
Denominators
• Subtracting fractions with unlike
denominators is just like adding       ex:
fractions with unlike denominators,
5    15
• Find LCD just like in adding
fractions with unlike denominators      8    24
and multiply numerators.
1     4
• Subtract. Simplify if needed.
- 6    24
19
24   pg. 8
Subtracting Fractions: Regroup and Rename
• When subtracting fractions, there
ex:
may be a problem like1 1/3-2/3.
Then you have to regroup the 1 1/3     0
to 1/3+3/3=4/3.                        1 1/3+3/3=4/3
• 4/3-2/3=2/3.
- 2/3      - 2/3
• Subtract. Simplify if needed.
2/3

pg. 9

```
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
 views: 1 posted: 2/18/2013 language: Unknown pages: 9