Subtract Mixed Numbers Unlike Denominators

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

• common numerator

• common denominator

• equivalent fraction

• mixed number

Solve and simplify to lowest terms.

• a

• b

• c

• d

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

• 3 4/6

• 3 2/3

• 3 1/3

• 3 1/2

9 and 3/8 minus 3 and 12/16

• 6 and 3/8

• 6 and 5/8

• 5 and 5/8

Add or subtract to solve.

• 6   4/10
• 6
• 12    8/10
• 5    8/10

• 2  3/4
• 2  8/9
• 3  1/2
• 5  1/2

• 2  2/3
• 7  1/2
• 7
• 6

• 5 7/12
• 4 7/12
• 5 5/12
• 4 5/12