Comparing Fractions with Unlike Denominators

1/4 + 3/8 =

• 5/8

• 3/8

• 4/12

• 4/8

Is this a correct answer?

• Yes, the student correctly added.

• No, you cannot add unlike denominators

• No, 5 + 7 is not 12

• No, 2 + 3 is not 5

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 8/9 - 5/6?

• 1/18

• 3/4

• 6/7

• 10/12

1/9 + 2/27

• 3/27

• 5/27

• 3/27

• 3/36

• 13/15
• 1 7/12
• 1
• 9/15

What is 9/10 - 3/4?

• 5/7

• 3/20

• 3/8 

• 9/10

Paula made some chili with 1/2 of a can of black beans and 3/8 of a can of pinto beans. How many cans of beans did Paula use in all?

• 4/10

• 4/8

• 7/8

• 1/8

Find the common denominator to compare fractions.

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Find the common denominator to compare fractions.

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