Adding Mixed Numbers with Unlike Denominators

What must you do first in order to add or subtract fractions with unlike denominators?

• add the numerators

• add the denominators

• find a common denominator

• find a common numerator

• 10 7/12
• 11 1/9
• 10 5/9
• 11 5/12

Find Lowest Common Denominator & solve
1    1/3   +    4    1/4 =

• 5    7/12

• 5    2/24

• 5    2/12

• 5    7/24

What math equation is being represented in the picture?

Find Lowest Common Denominator & solve
4    1/2    +   14    6/12 =

• 18   7/14

• 18   12/12

• 18   24/24

• 18

Find Lowest Common Denominator & solve
8     4/5    +    9    1/10  =

• 18   5/15

• 17   5/10

• 17   9/20

• 17   9/10

Word Problem:
Two cats, Fluffy and Oreo, met in the Park. Fluffy's tail is 3   1/3 of a meter long. Oreo's tail is 2   1/4 of a meter long.
How much Longer is Fluffy's tail than Oreo's tail?

• 5     7/12

• 1     1/12

• 1     2/7

• 5     2/12

8   4/5    +    9  1/10  =