# GRE Math : How to subtract rational expressions with different denominators

## Example Questions

### Example Question #5 : Rational Expressions

Choose the answer which best simplifies the following expression:       Explanation:

To simplify this expression, first multiply both terms by the denominator of the other over itself:  Now that you have a common denominator, you may subtract: ### Example Question #1 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the following expression:       Explanation:

To simplify this problem, multiply each term by the denominator of the other over itself:  Now that both terms share a denominator, you can subtract: ### Example Question #2 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the following expression:       Explanation:

To solve this problem, first multiply each term of the original expression by the denomenator of the other over itself: Then you will have two terms with a common denomenator:   ### Example Question #3 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the expression below:       Explanation:

To simplify this problem, multiply each term by the denomenator of the other over itself: Then you will yield terms with a like denomenator, which can be combined:  ### Example Question #4 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the expression below:       Explanation:

To simplify the expression, first multiply each term by the denomenator of the other over itself: Then you yield terms with common denomenators, which can be combined:  ### Example Question #5 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the following expression:       Explanation:

To simplify, first multiply each of the terms by the denomenator of the other over itself: Then you will get terms with a common denomenator, which can be combined:  ### Example Question #6 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the expression below:       Explanation:

To simplify, first multiply each of the terms by the denomenator of the other over itself: You will yield terms with a common denomenator, which can be combined:  ### Example Question #7 : How To Subtract Rational Expressions With Different Denominators

Choose the answer which best simplifies the expression below:       Explanation:

To simplify, multiply each of the terms by the denomenator of the other, over itself: You will yield terms with a common denomenator, which can be combined:  Tired of practice problems?

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