Find each sum or difference. See Example 1. 13 + (-4)

검증된 단계별 안내

Recognize that the problem involves adding a positive number and a negative number, which is equivalent to subtraction.

Rewrite the expression \(13 + (-4)\) as \(13 - 4\) to simplify the operation.

Subtract the smaller number from the larger number: calculate \(13 - 4\).

Determine the sign of the result based on the larger absolute value; since 13 is positive and greater than 4, the result will be positive.

Write the final expression for the sum or difference as the positive result obtained from the subtraction.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Integer Addition and Subtraction

This concept involves combining positive and negative whole numbers. Adding a negative number is equivalent to subtracting its absolute value, so 13 + (-4) means moving 4 units left from 13 on the number line.

Number Line Representation

A number line visually represents integers and their operations. Positive numbers lie to the right of zero, negatives to the left, and addition or subtraction corresponds to moving right or left, helping to understand sums like 13 + (-4).

Properties of Addition

Understanding that addition is commutative and associative helps simplify calculations. Recognizing that adding a negative number is the same as subtracting aids in correctly evaluating expressions such as 13 + (-4).