What Does it Mean to Subtract a Negative Number?

How to Add and Subtract Negatives: 13 Steps (with Pictures)

Integer Subtraction Using Number Lines and Symbolic Notation

Negative and Positive Rules Adding, Subtraction & Examples

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Subtracting Positive and Negative Numbers – GeoGebra

Adding and Subtracting Positive and Negative Numbers

Adding & subtracting negative numbers (video)

Why do you add when subtracting negative numbers? - Quora

Teaching the ADDITION & SUBTRACTION of Integers