Subtracting Fractions and Methods

This video tutorial focuses on subtracting fractions, starting with two fractions and progressing to three or more. It demonstrates the cross-multiplication method and introduces an alternative approach using common denominators. The tutorial includes multiple examples and encourages viewers to practice. It concludes with a final example and a brief mention of related videos on multiplying and dividing fractions.

What is the first step in subtracting two fractions using the cross-multiplication method?

• Divide the numerators

• Multiply the denominators

• Subtract the denominators

• Add the numerators

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

In the example of subtracting 4/3 by 3/4, what is the result after cross-multiplying and subtracting?

• 9/12

• 5/12

• 7/12

• 11/12

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CCSS.7.NS.A.1C

What is the result of subtracting 3/8 from 1/7 using the cross-multiplication method?

• 11/56

• 14/56

• 12/56

• 13/56

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CCSS.7.NS.A.1C

Which of the following is a benefit of using the common denominator method for subtracting fractions?

• It avoids finding a common denominator

• It is faster for all problems

• It is useful for multiple fractions

• It requires less calculation

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

When subtracting 8/9, 1/3, and 2/5, what is the least common multiple of the denominators?

• 45

• 75

• 30

• 60

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CCSS.5.NF.A.1

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What is the result of subtracting 9/10, 1/5, and 2/7 after finding a common denominator?

• 29/70

• 27/70

• 31/70

• 33/70

Tags

CCSS.7.NS.A.1C

Which method is recommended for subtracting three or more fractions?

• Long division

• Common denominator

• Direct subtraction

• Cross-multiplication

Tags

CCSS.7.NS.A.1C

What is the final answer for the subtraction of 9/10, 1/5, and 2/7?

• 27/70

• 28/70

• 29/70

• 30/70

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

In the example of subtracting 3/4, 1/2, 5/3, and 2/5, what is the common denominator used?

• 30

• 45

• 60

• 75

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of the complex example involving 3/4, 1/2, 5/3, and 2/5?

• 92/60

• 91/60

• 90/60

• 89/60

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2