What mixed-sign addition means

Mixed-sign addition combines positive and negative numbers in one sum. A negative decimal acts like taking value away, so the final answer depends on which side has the larger total magnitude.

Use the table as a sign check

The running-total table is useful when you want to confirm each signed step instead of trusting only the final answer. That makes it practical for learning and for checking homework.

Where this comes up

Typical examples include net gains and losses, bank adjustments, coordinate displacements, and scientific values that can move above or below zero.