Master addition and subtraction of integers using the number line to visualize movement (right for +, left for -). Learn the critical rules for combining signs (e.g., 3 - (-6) = 3 + 6) and how to use the additive inverse concept (e.g., -13 + 21) for mental math with larger numbers. This video provides step-by-step problem-solving techniques for working with positive and negative numbers, essential for building strong foundational skills in algebra and arithmetic