Fractions With Like Denominators

1
Fractions With Like Denominators

• Lesson 4-2

2
Terminology
Like decimals, fractions represent parts of
numbers. A fraction is usually a number that is
between 0 and 1.
Numerator - number on top
Denominator - number on bottom
3
To add or subtract fractions with like
denominators

• If the denominators are already the same, then
  youre ready to add or subtract.
• Add or subtract the numerators. Keep the
  denominators the same.
• Simplify (reduce) the fraction, if possible.
• If you end up with an improper fraction, change
  it to a mixed number.

4
Examples
1
2
3


5
5
5
This answer cannot be reduced any further.
5
9
4
5
2
2



14
14
14
7
The GCF of 4 and 14 is 2, so we divide by 2 to
reduce.
6
8
3
11


9
9
9
This is an improper fraction (the top is bigger
than the bottom), so we want to change it to a
mixed number.
To do this, divide the bottom into the top.
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Answer
1
2
9
11
9
9
2
7
Try Some
7
5
1

6
12
12
4
1
5


7
7
7
1
12
1
8


15
3
15
8
Homework Time!