GRE Math : How to subtract odd numbers

Study concepts, example questions & explanations for GRE Math

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Example Questions

Example Question #1 : How To Subtract Odd Numbers

Assume  and  are both odd whole numbers and .

What is a possible solution for 

Possible Answers:

Correct answer:

Explanation:

An odd whole number minus an odd whole number will result in an even whole number. Since , the subtraction will result in a negative even whole number. The only answer that fits these requirements is .

Example Question #91 : Integers

Choose the answer below which best solves the following equation:

Possible Answers:

Correct answer:

Explanation:

If you have trouble with problems like this, try stacking the numbers, and subtracting one place at a time.  First, seven minus one is six, so that's your ones digit.  Next, three minus three is zero, so that's your tens digit.  Seven minus two is five, so that's your hundreds digit, and finally, one minus zero is one so that's you're thousands digit.  

Example Question #2 : How To Subtract Odd Numbers

Solve the following:

Possible Answers:

Correct answer:

Explanation:

To solve, simply subtract.  If you have trouble subtracting, try splitting the numbers up and adding your results:

 

Example Question #93 : Integers

Solve the following:

Possible Answers:

Correct answer:

Explanation:

To perform this operation, simply subtract.  If you are having trouble, you can split the problem into two easier to solve portions, by splitting the numbers up:

 

Example Question #94 : Integers

Solve the following:

Possible Answers:

Correct answer:

Explanation:

To solve, simply subtract.  If you have trouble subtracting, you can split the problem up and add your results back together:

Example Question #3 : How To Subtract Odd Numbers

Solve the following:

Possible Answers:

Correct answer:

Explanation:

To solve, simply subtract.  If you have trouble subtracting, you can split the numbers up, subtract, and add your results:

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