Addition and Subtraction of Rational Expressions with Different Denominators

When adding and subtracting rational expressions, my first step should be to:

• Combine like terms in the numerators.

• Determine a Least Common Denominator.

• Factor all of the numerators and all of the denominators.

• Change the operator to multiplication and reciprocate the second fraction.

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CCSS.HSA.APR.D.7

When adding or subtracting rational numbers, what must you have?

• Common Numerator

• Quick Answering Skills

• Common Numbers

• Common Denominators

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CCSS.7.NS.A.1C

It can be written in the form P/Q where P and Q are both polynomials and Q is not equal to 0.

• Expressions

• Decimal expressions

• Rational expressions

• Percentage

Perform the operation

• A

• B

• C

• D

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CCSS.HSA.APR.D.7

• A

• B

• C

• D

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CCSS.HSA.APR.D.7

• A
• B
• C
• D

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CCSS.HSA.APR.D.7

• k = 7
• x = 7.1
• x = 7.6
• x = 1/7

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CCSS.HSA.REI.A.2

• A
• B
• C
• D

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CCSS.HSA.APR.D.7

• A
• B
• C
• D

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CCSS.HSA.APR.D.7

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CCSS.HSA.APR.D.7