Understanding Unlike Fractions

The video tutorial explains how to compare two unlike fractions by converting them to like fractions. It begins by introducing the concept of unlike fractions and the need to find a common denominator. The least common multiple (LCM) of the denominators is used as the common denominator. The tutorial then demonstrates how to convert each fraction to have this common denominator, ensuring the value of the fractions remains unchanged. Finally, it shows how to compare the fractions by comparing their numerators, concluding that the fraction with the larger numerator is greater.

What is the first step in comparing two unlike fractions?

• Convert them to decimals

• Subtract the smaller fraction from the larger one

• Find a common denominator

• Add the fractions together

How do you determine the common denominator for two fractions?

• By multiplying the numerators

• By finding the least common multiple

• By finding the greatest common divisor

• By adding the denominators

What is the LCM of 3 and 5?

• 10

• 15

• 5

• 8

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When converting 2/3 to have a denominator of 15, what should the numerator be?

• 15

• 5

• 10

• 6

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CCSS.3.NF.A.3B

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What operation is performed on both the numerator and denominator to convert 3/5 to a denominator of 15?

• Subtract 2

• Multiply by 3

• Divide by 5

• Add 3

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After converting fractions to have the same denominator, how do you compare them?

• Compare the denominators

• Compare the numerators

• Add the fractions

• Subtract the fractions

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Which fraction is greater: 10/15 or 9/15?

• 10/15

• 9/15

• They are equal

• Cannot be determined

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What should you do when comparing unlike fractions?

• Convert them to percentages

• Make the denominators the same

• Make the numerators the same

• Add them together

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