Adding Integers with Opposite Signs Using a Number Line

This lesson teaches how to add integers with opposite signs using a number line. It explains the process of moving in the same direction for integers with the same sign and in opposite directions for integers with opposite signs. Real-life examples, such as debt and earnings, football yardage, elevator movement, and diving, are used to illustrate the concept. The lesson concludes with a summary of the key points.

Explain the process of adding -3 and 6 using a number line.

What is the final position of a diver who dives to 20 feet below sea level and then swims up 15 feet?