Add and Subtract Unlike Fractions

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

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

• 10/10

• 1

• 6/10

• 6/12

• 7/20

• 3/12

• 3/10

• 7/10

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

• 2/7

• 5/10

• 0/7

• 7/10

• 11/10

• 4/10

• 1 1/10

• 4/7

• 5/4

• 1 1/4

• 4/4

• 4/6