Find each sum or difference. See Example 1.13 + (-4)

Verified step by step guidance

1. Identify the operation: This is an addition problem involving a positive number and a negative number.
2. Rewrite the expression: 13 + (-4) can be rewritten as 13 - 4.
3. Understand the concept: Adding a negative number is the same as subtracting its absolute value.
4. Perform the subtraction: Subtract 4 from 13.
5. The result of the subtraction will give you the final answer.

Key Concepts

Addition of Integers

Addition of integers involves combining two whole numbers to produce a sum. When adding a positive integer to a negative integer, the result is determined by the absolute values of the numbers. If the positive integer is larger, the result is positive; if the negative integer is larger, the result is negative.

Negative Numbers

Negative numbers are values less than zero, represented with a minus sign. They are used to indicate a deficit or a loss in various contexts, such as temperature or financial calculations. Understanding how to work with negative numbers is crucial for performing arithmetic operations correctly.

Number Line

A number line is a visual representation of numbers in a straight line, where each point corresponds to a number. It helps in understanding the relative positions of positive and negative numbers, as well as the results of addition and subtraction. Using a number line can clarify how to combine integers, especially when dealing with negative values.