Understanding Opposites on a Number Line

This lesson explains the concept of opposites using a number line. It covers how to locate positive and negative numbers, the role of zero, and how to find opposites by measuring equal distances from zero. The lesson includes examples on both horizontal and vertical number lines, emphasizing that the opposite of a positive number is negative and vice versa.

Describe the relationship between positive and negative numbers on a number line.

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What is the opposite of negative 18?

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