Mixed Numbers Common Denominator

A _________ is written as a whole number and a fraction.

• unlike denominators

• mixed number

• proper fraction

• common multiple

The ____________________ is a common multiple of two or more denominators.

• equivalent

• simplest fraction

• common denominator

• mixed number

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

You must find the ​ (a)   before you can add or subtract fractions with unlike denominators.

• common denominator

• common numerator

• multiple

• simplified fraction

You must find the (a)   before you can add or subtract fractions with unlike denominators.

• common denominator

• common numerator

• multiple

• simplified fraction

Which 2 expressions​ do you need to find Common Denominators for?​ (a)   ​ (b)  

What is the the next step to finding this answer?

• Add the numerators (1+1=2)

• Multiply 12 X 1 for both fractions to find a new numerator
  

• Multiply to find each new numerator by the multiple used to get 12. (3 X1) (4 X 1)

• This is a mistake, you don't need to convert to twelfths

Addition:
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