Adding and Subtracting Fractions with Like Denominators v.2.ppt.pdf

gsntts

1. Adding and Subtracting
Like Fractions

2. Like Fractions
●Fractions that have the “same” denominator
are “like” fractions.
and are like fractions.

3. Adding Like Fractions
●Add the numerators
●Keep the denominator the same
●Simplify, if necessary
●Write the sum

4. Adding Like Fractions
+ =
●Add the numerators1 + 4 = 5
●Keep the denominator the same6
●Write the sum
●Simplify, if necessaryAlready in simplest form

5. Adding Like Fractions
+
●The GCF of 8 and 10 is…
÷
÷
2
2
=
●Add the numerators1 + 7 = 8
●Keep the denominator the same10
●Write the sum
●Simplify, if necessary
2

6. Adding Like Fractions
+ =
Change improper fractions into mixed numbers
28÷24=1 =
÷
÷
4
4 1
Simplify

7. Subtracting Like Fractions
●Subtract the numerators
●Keep the denominator the same
●Write the difference
●Simplify, if necessary

8. Subtracting Like Fractions
-

=
●Subtract numerators5 – 1 = 4
●Keep the denominator the same8
●Write the difference
●Simplify, if necessary
÷
÷
4
4
=
●The GCF of 4 and 8 is…
4

9. Subtracting Like Fractions
- =
The GCF of 5 and 15 is …5
÷
÷
5
5
=
=
Simplify

10. Review of Adding and
Subtracting Like Fractions
●Add or subtract the numerators
●Keep the denominator the same
●Write the sum or difference
●Simplify, if necessary