Find each sum or difference. -12.31 - (2.13)

Key Concepts

Subtraction of Real Numbers

Subtraction is one of the basic arithmetic operations, representing the process of taking one number away from another. In the context of real numbers, it involves finding the difference between two values. For example, in the expression -12.31 - (2.13), we are subtracting 2.13 from -12.31, which requires understanding how to handle negative numbers.

Negative Numbers

Negative numbers are values less than zero, represented with a minus sign. They are essential in understanding the number line, where they extend to the left of zero. When performing operations with negative numbers, such as subtraction, it is crucial to recognize how they affect the overall value, especially when combined with positive numbers.

Order of Operations

The order of operations is a set of rules that dictates the sequence in which mathematical operations should be performed to ensure consistent results. Commonly remembered by the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction), it is important to apply these rules correctly when evaluating expressions, particularly when they involve multiple operations.