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.

When adding two positive numbers on a number line, in which direction do you move?

• Upwards

• To the right

• To the left

• Downwards

If you add 2 and -3 on a number line, what is the result?

• -5

• 5

• -1

• 1

A football team gains 6 yards and then loses 10 yards. Where are they now?

• 10 yards behind

• 6 yards ahead

• 4 yards behind

• 4 yards ahead

If you park 3 floors underground and ride up 6 floors, which floor do you end up on?

• 3rd floor

• 6th floor

• 1st floor

• Ground floor

A diver goes 20 feet below sea level and then swims up 15 feet. How deep is she now?

• 20 feet below sea level

• 5 feet below sea level

• 5 feet above sea level

• 15 feet below sea level