Dissimilar Fraction-fractions with different
denominators.
1
2
2
5
Example: and
To add or subtract dissimilar fraction
1. Determine the least common
denominator.
2. Get the equivalent fractions using
this denominator.
3. Add or subtract the numerators.
Then write the sum or difference over
the common denominator.
4. Simplify or write the answer in lowest
terms if possible.
Gia made two types of cookies. She
2
1
3
4
used cup of sugar for one recipe and
cup of sugar for the other. How much
sugar did she use in all?
Solution:
2
1
3
4
What is the sum of + ?
Add the following fractions. Express your
answer to simplest form or lowest term, if
needed. Write your answers on your
answer sheet.
2
1
8
3
1
3
2
8
1. + =
4. + =
2.
1
5.
4
4
7
3
+ =
5
2
+ =
5
3.
5
11
1
+ =
4
Lesson 1. Adding simple fractions
without regrouping
Give the least common denominator
(LCD) of the following dissimilar fractions.
4
6
5
7
4
1
1. and
4.
7
and
3
2.
5.
1
4
and
1
4
3
3
5
+ =
5
2
9
3
11
3. and