GRE Math : How to subtract negative numbers
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Example Questions
Example Question #1 : Negative Numbers
Quantity A:
Quantity B:
The relationship cannot be determined from the information given.
The two quantities are equal
Quantity B is greater
Quantity A is greater
Quantity A is greater
Since both quantities have an 
Example Question #6 : Negative Numbers
If 
To make 
Example Question #711 : Gre Quantitative Reasoning
Quantity A:
Quantity B:
Which of the following is true?
Quantity A is larger.
The two quantities are equal in size.
Quantity B is larger.
The relationship between the quantities cannot be determined.
Quantity B is larger.
A problem like this one is very easy. All you need to do is manage your arithmetic well. Remember that when you subtract a negative number, this is the same as adding the positive of that number. Therefore, you can rewrite each of your quantities:
Quantity A:
Using a calculator, this comes out to be:
Quantity B:
Using a calculator, this comes out to be:
Therefore, quantity B is larger.
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