Adding Negative Numbers on a Number Line

Math with Mr. J

In this clear and visual mathematics tutorial, Mr. J demonstrates how to add negative numbers using a number line strategy. The video guides viewers through four specific examples that cover different scenarios: adding two negative numbers, adding a positive to a negative, adding a negative to a positive, and a larger double-digit problem without a visual number line. By treating addition of negative numbers as movement to the left on a number line, the video makes abstract integer operations concrete and understandable. The content focuses on the foundational concept of integers and directionality. Key themes include visualizing math problems, understanding that adding a negative is equivalent to moving left (or subtraction), and using real-world analogies like temperature to verify answers. The progression moves from fully visual support with drawn "jumps" on a number line to mental math strategies, scaffolding the learner toward independence. This video is an excellent resource for introducing or remediating integer operations in middle school classrooms. It is particularly useful for students who struggle with abstract rules (like "keep the sign of the larger number") because it provides a spatial reasoning method instead. Teachers can use this video to model how to set up integer problems on paper or as a reference for students practicing independent work with positive and negative integers.