Which of the following statements about addition and subtraction rules is correct?

The statement regarding the importance of changing signs appropriately when performing addition or subtraction is correct. In both operations, especially when dealing with negative numbers or when combining different signed numbers, it is crucial to manage the signs correctly to ensure accurate results.

For example, if you are adding a negative number, this is equivalent to subtracting that number from the other value. This transition often requires careful attention to the signs involved. A common mistake occurs when students overlook the necessity to switch signs when adding a negative number, which can lead to incorrect calculations.

In terms of operations, understanding how to manipulate and represent negative and positive values effectively is foundational in mathematics and helps avoid errors in larger calculations. Therefore, adhering to the correct sign rules is essential for completing addition and subtraction accurately.