Adding Fractions Like Denominators More Than 1

What must you have to add and subtract fractions?

• Common numerators

• Different numerators

• Different denominators

• Common denominators

When adding fractions with like denominators, the denominators....

• stay the same

• are added together

How can you find a common denominator?

• Add the denominators together

• Pick your favorite number

• Find a common multiple for the two denominators

After changing the denominator, what do you need to do to the numerator?

• Nothing

• Multiply the numerator by the same number as the denominator

• Double it

What is the sum of these fractions in lowest terms?

• 7/18

• 7/9

• 12/9

• 12/81

What is 3/4 + 1/4 = ?

Mathematical Equivalence

ON

What is the sum of these fractions in lowest terms?

• 5/12

• 5/24

• 6/12

• 6/144

3 2/7 + 8 1/3

When adding and subtracting fractions, what needs to be the same?

• the numerator

• the denominator

• nothing

• everything

What is the least common denominator for this problem? 3/16 + 2/4 =

• 24

• 8

• 16

• 32