Adding Fractions with Unlike Denominators and Mixed Numbers

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

What is the sum of these fractions in lowest terms?

• 4/5

• 3/20

• 17/20

• 4/20

What is the sum of these fractions?

• 4/5

• 3/20

• 17/20

• 4/20

Match the following fractions with their sums.

• 1/20 + 1/20

• 2 1/10

• 1 + 6/5

• 2 2/10

• 1/3 + 2/9

• 1/10

• 1/2 + 8/5

• 5/9

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

• numerators

• denominators

• mixed numbers

• equivalent fractions

Solve.

• 5/8

• 23/40

• 21/40

• 1/2

Once I have completed adding or subtracting fractions, I should always ____________ if possible.

• make equivalent fractions

• add again

• simplify

• multiply