# Subtraction Using a Calculator

We must be careful when using the subtraction operation on a calculator because calculators contain both a “minus” key and a “negative” key. If the wrong button is used you will get an error or and incorrect answer.

We must be careful when using the subtraction operation on a calculator because calculators contain both a “minus” key and a “negative” key. If the wrong button is used you will get an error or and incorrect answer.