How to subtract decimals

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GRE Quantitative Reasoning › How to subtract decimals

Questions 1 - 3

1

Solve for :

Explanation

To solve for , subtract from both sides of the equation. , therefore, .

If you have trouble subtracting the decimals, you can multiply both of them by to get whole numbers, then subtract as normal, then divide your result by .

2

$0.327+\left(\frac{3}{8}-(0.048+2.176)\right)=?$

Explanation

Make sure to follow the order of operations. Begin by combining all terms inside the parentheses:

$0.327+\left(\frac{3}{8}-(0.048+2.176)\right)=$

$0.327+\left(\frac{3}{8}-(2.224)\right)$

Convert the fraction to a decimal and once again complete the operations inside the parentheses:

$\frac{3}{8}=0.375$

The answer is .

3

Quantity A:

Quantity B:

Quantity A is greater.

Quantity B is greater.

The two quantities are equal.

The relationship cannot be determined.

Explanation

Use the values of .5 and 2 as possible x values. If x = 2, Quantity A is positive and greater, but if x = .5, Quantity A is negative and therefore smaller. As such, the relationship cannot be determined.

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