Adding and Subtracting Like Fractions

download report

Transcript Adding and Subtracting Like Fractions

Adding & Subtracting
Fractions With Like
Denominators
Numerator
Denominator
To add or subtract fractions
with like denominators:
• Denominators the same
add or subtract
Numerators
leave the denominator the
same
• Simplify the answer
• Improper fractions
mixed numbers.
Examples
1
5
2
+
5
=
9
14
5 =
14
=
The GCF of 4 and 14 is 2, so we divide by 2 to
reduce.
8
9
3
+ 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.
Try Some
7
12
5
=
12
4
1
+
=
7
7
8 + 12
=
15
15
Homework Time!