Steps to Adding and Subtracting Fractions with Unlike Denominators

(Choose one that is true) 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

Pick the steps that are true

• find the common denominators, add or subtract, change the numerators

• multiply the denominators, add or subtract the numerators, simplify, divide the fraction

• Find the least common denominators, what you do to the top do to the bottom, add or subtract, simplify

• add or subtract, simplify, multiply denominators

What are the steps for making two unlike denominators like?

• Look at the denominators

• Find the LCM or use the butterfly method

• Convert (change) the fractions based on the OPPOSITE denominator to find the Common Denominator

• Multiply the numerators by the same opposite denominator

• Rewrite your now completed converted fractions

What is the first step in solving this problem? 
⅘ + ½ =

• Add the top parts of the fraction

• Rewrite the fractions in the simplest form. 

• Find a common denominator. 

• Make each fraction into an improper faction. 

What is the least common denominator you could use to subtract 1/3 and 1/4?

• 3

• 4

• 24

• 12

Solve this equation using the least common denominator.
¼ + ½

• 3/4

• 2/8

• 6/4

• 6/8

Rearrange the steps for adding & subtracting fractions with unlike denominators in the correct order.

• List multiples and find the LCD

• Rewrite the equivalent fractions

• Add or subtract the equivalent fractions.

• Simplify if necessary.