Subtracting Unlike Fractions

1
Subtracting Unlike Fractions

• Lesson 5.4

2
Follow the Same Steps as Adding

• Check the denominators. If they are the same,
  just subtract.
• If they are different, find equivalent fractions
  with common denominators.
• Subtract the equivalent fractions.
• Simplify.

3
Example 1
8, 16, 24, 32, 40
4, 8, 12, 16, 20
5
1
8
4
5
2
x 2
x 1
3

8
8
8
4
Example 2
3, 6, 9, 12, 15
2
3
9, 18, 27, 36, 45
3
9
x 1
6
3
3
x 3

9
9
9
1

This fraction can be reduced. The GCF of 3 and 9
is 3, so we divide by 3.
3
5
Homework Time