Adding and Subtracting Rational Expressions Explained

The video tutorial explains how to add fractions by finding a common denominator through factoring. It provides two example problems, demonstrating the process of factoring denominators and combining numerators. The tutorial also highlights common mistakes and offers strategies for handling subtraction in fraction problems.

What is the first step in adding fractions with different denominators?

• Find a common numerator

• Multiply the numerators

• Find a common denominator

• Subtract the denominators

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CCSS.5.NF.A.1

CCSS.5.NF.A.2

Why is factoring important in finding a common denominator?

• It simplifies the numerators

• It helps identify the components of each denominator

• It increases the value of the fractions

• It reduces the fractions to their simplest form

What do you multiply by to not change the value of a fraction?

• Zero

• The denominator

• The numerator

• One

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CCSS.3.NF.A.3A

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What happens to a fraction when its numerator and denominator are the same?

• It remains unchanged

• It becomes 0

• It becomes 1

• It doubles in value

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CCSS.3.NF.A.1

CCSS.3.NF.A.2A

After finding a common denominator, what is the next step?

• Reduce the fraction

• Factor the numerator

• Combine the denominators

• Combine the numerators

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CCSS.HSA.APR.D.7

What should you always check for after simplifying your fraction?

• If the fraction equals one

• If the fraction can be divided by 2

• If the denominator can be simplified

• If the numerator can be factored further

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CCSS.HSA.APR.D.6

In subtraction of fractions, what is a common mistake to avoid?

• Adding the denominators

• Forgetting to distribute the negative

• Ignoring the numerators

• Multiplying instead of subtracting

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CCSS.7.NS.A.1C

How do you handle a subtraction problem when working with fractions?

• Ignore the subtraction sign

• Subtract both numerators and denominators

• Convert it into an addition problem

• Only subtract the numerators

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CCSS.7.NS.A.1C

Why is it important to put subtraction in parentheses when distributing?

• To simplify the fraction

• To make the equation look cleaner

• To ensure correct distribution of the negative

• To avoid adding by mistake

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CCSS.6.EE.A.3

What is the result when the numerator and denominator have a common factor that cancels out?

• The denominator's value

• The numerator's value

• 0

• 1

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CCSS.HSA.APR.D.6