PSAT Math : How to subtract fractions

Study concepts, example questions & explanations for PSAT Math

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Example Questions

Example Question #101 : Arithmetic

Define an operation  as follows:

For all real ,

.

Evaluate .

Possible Answers:

Correct answer:

Explanation:

Example Question #102 : Arithmetic

Define an operation  as follows:

For all real ,

.

Evaluate .

Possible Answers:

Correct answer:

Explanation:

Example Question #103 : Arithmetic

Define an operation  as follows:

For all real ,

Evaluate .

Possible Answers:

Correct answer:

Explanation:

Example Question #104 : Arithmetic

Define an operation  as follows:

For all real ,

.

Evaluate .

Possible Answers:

Correct answer:

Explanation:

 

Example Question #105 : Arithmetic

Define an operation  as follows:

For all real ,

Evaluate 

Possible Answers:

Correct answer:

Explanation:

Example Question #106 : Arithmetic

Define an operation  as follows:

For all real ,

.

Evaluate .

Possible Answers:

The correct answer is not among the other responses.

Correct answer:

The correct answer is not among the other responses.

Explanation:

This answer is not among the choices given.

Example Question #107 : Arithmetic

Subtract and simplify the fractions:

Possible Answers:

Correct answer:

Explanation:

First we need to give them common denominators. Remember, whatever you do to the denominator you must do to the numerator:

From here, we do algebraic operations to subtract and simplify.

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