Add Fractions and Mixed Numbers Like Denominators

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

• stay the same

• are added together

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

• the numerator

• the denominator

• nothing

• everything

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?

• 5/12

• 5/24

• 6/12

• 6/144

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 number could be a common denominator for these two fractions?
2/3   and   3/4

• 3

• 4

• 7

• 12

What number could be a common denominator for these two fractions?
1/5   and   5/6?

• 30

• 11

• 6

• 5

When adding and subtracting fractions, which value needs to be the same in all values being added/subtracted?

• Numerator

• Denominator