Common Denominators and Simplifying Fractions

When you add or subtract fractions with unlike denominators you..

• Find the greatest common factor to change your denominator

• Change the denominator by picking a random number then divide

• Find the least common multiple to change your denominator

• none of these are true

3/4 - 2/10

• 11/20

• 9/10

• 11/24

• 9/4

4/5 + 3/8 (be sure to simplify)

• 32/40

• 1 7/40

• 2 5/7

• 1 1/2

3/5 - 5/10

• 1/10

• 8/5

• 1/5

• 8/0

Add the following fractions. SIMPLIFY

You must find the (a)   before you can add or subtract fractions with unlike denominators.

• common denominator

• common numerator

• multiple

• simplified fraction

Mathematical Equivalence

ON

What is the sum of these 2 fractions? Simplify the answer.

You must find the ​ (a)   before you can add or subtract fractions with unlike denominators.

• common denominator

• common numerator

• multiple

• simplified fraction

• 10

• 15

• 20

• 25