Addition and Subtraction Common Denominator Fractions

Find Lowest Common Denominator & solve
1     5/7  +   14    1/2

• 15  1/14

• 15  6/21

• 15  17/21

• 15  17/14

Find Lowest Common Denominator & solve
1   3/7      +       7   5/11 =

• 8   68/77

• 8   68/107

• 8   10/77

• 8    8/18

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

• 5    7/12

• 5    2/24

• 5    2/12

• 5    7/24

Subtraction:
Find Lowest Common Denominator & solve
8    5/7    -    7    2/3 = 

•     3/4

•    1/21

•      1/24 

•     3/24

Mr. Smith buys 5/8 pound of red grapes and 2/8 pound green grapes. How many pounds did Mr. Smith buy?

• 7/8 pound

• 3/8 pound

If Sadie ate a 2/9 of a pizza, and Payton ate 3/9 of a pizza, how much much of the pizza was left?

• 4/9

• 9/5

• 5/9

• 4/5

2/7 + 3/7 = 

• 4/7

• 5/7

• 5/14

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

When the denominators are not the same, I must find a...

• common numerator

• common denominator

• equivalent fraction

• mixed number

When adding or subtracting fractions, I NEVER add or subtract the...

• numerators

• denominators

• mixed numbers

• equivalent fractions