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# The Number Line - PowerPoint PPT Presentation

The Number Line. Make your Own Number Line!. Vocabulary. Positive numbers: numbers that are greater than 0. These numbers are located to the right of 0 on a number line. Positive numbers can be written with or without a plus sign. Examples: 3, +3, 5, +6. Vocabulary.

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## PowerPoint Slideshow about ' The Number Line' - casper

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Presentation Transcript

### The Number Line

• Positive numbers: numbers that are greater than 0. These numbers are located to the right of 0 on a number line. Positive numbers can be written with or without a plus sign.

• Examples: 3, +3, 5, +6

• Negative numbers: numbers that are less than 0. These numbers are located to the left of 0 on a number line. Negative numbers must always be written with a negative (minus) sign.

• Examples: -3, -4, -5, -10

• When do we use or see negative numbers?

• The number 0 is neither positive nor negative!

Questions Plot these points on a number line.

• What point on the number line represents sea level?

• Which location is closest to sea level? How do you know?

• Is the location mentioned in the question before above or below sea level?

• Which two locations are the same distance from sea level? Are these locations above or below sea level?

• Which location has the least elevation? How do you know?

Whiteboards! Plot these points on a number line.

Using your paper number line to help, write a number line from -10 to 10 and plot these points on your whiteboards:

• 5

• -10

• 8

• -9

• 6

• -2

Vocabulary Plot these points on a number line.

• Integers: The set of all whole numbers and their opposites.

• …-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5…

Vocabulary Plot these points on a number line.

• Opposites: Two numbers are opposites if, on a number line, they are the same distance from 0 but on different sides of 0.

• Examples:

• 5 and -5

• 2.15 and -2.15

Whiteboards! Plot these points on a number line.

• Give the opposite of the following numbers:

• 2

• -9

• -45

• 16

• -20