Adding and Subtracting Fractions with Same Denominator

11/5 - 6/5 =

• 1 1/5

• 1 7/5

• 1

• 5/5

7/12 - 3/12 =

• 1/3

• 4/12

• 10/12

• 4/24

6/7 - 1/7 =

• 1

• 7/7

• 5/7

• 5/1

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

• the numerator

• the denominator

• nothing

• everything

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

• stay the same

• are added together

When adding or subtracting fractions with unlike denominators, what is the first step?

• Add the numerators

• Add the denominators

• Find a common denominator

How can you find a common denominator?

• Add the denominators together

• Pick your favorite number

• Find a common multiple for the two denominators

Which of these numbers could NOT be a common denominator for these two fractions?
2/4   and   3/8

• 32

• 12

• 8

• 24

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

• 3

• 4

• 7

• 12

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

• Numerator

• Denominator