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

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Presentation Transcript

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

- 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

Brainstorm

- When do we use or see negative numbers?

In your Notes: IMPORTANT

- The number 0 is neither positive nor negative!

These are the elevations and depressions of some locations. Plot these points on a number line.

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

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