Adding Fractions

What must you have to in order to add and subtract fractions?

• common numerators

• Different numerators

• common denominators

• different denominators

What number could be a common denominator for these two fractions:

• 30

• 11

• 6

• 12

What is the sum of these fractions? Write your answer in simplest form.

• 4/5

• 3/20

• 17/20

• 4/20

• 2/5
• 5/6
• 4/6
• 1/5

What is the sum of these fractions in lowest terms?

• 7/18

• 7/9

• 12/9

• 12/81

What is the sum of these fractions in lowest terms?

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 in lowest terms?

Find the sum.

• 7/18

• 7/9

• 12/9

• 12/81

What is the sum of these fractions in lowest terms?

• 22/5

• 6/3

• 22/15

• 6/15