Chapter 2 Integers and Rational Numbers (take out chapter 1 from your notebook and leave ch1 stuff at home in a folder to study off of for star test and.

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Integers & Absolute Value

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Presentation transcript:

Chapter 2 Integers and Rational Numbers (take out chapter 1 from your notebook and leave ch1 stuff at home in a folder to study off of for star test and final project)

2.1 Integers and the Number Line Objectives: 1.To give an integer that corresponds to a real-world situation 2.To compare integers using 3.To find the absolute value of a number

Integers Any number such as... –4, -3, -2, -1, 0, 1, 2, 3, 4... Positive Integers are greater than zero. Negative Integers are less than zero. “Zero” is neither positive or negative.

Number Line

Two numbers are OPPOSITES of one another if they are the same distance from zero but in opposite directions and -6 are opposites.

4 and -4 are opposites

Absolute Value: The number of units a number is from zero on the number line. (Always Positive) |-4| = 4

Absolute Value: (Always Positive) |6| = 6

Find the Opposite and the Absolute Values of

Find the Opposite and the Absolute Values of Opposite of –7 is 7 7 units

Find the Opposite and the Absolute Values of |-7| = 7 7 units

Evaluating Absolute Value Before you evaluate find the absolute value of the number then do the operation Example: = = 9

Example: Evaluate t – 15 for t = -36 = =36-15 =21

Write an integer that means “a profit of $4 +4

Write an integer that means “12 yards gained” +12

Write an integer that means “a loss of 73 points on the NASDAQ” -73

Write an integer that means “losing 11 pounds on a diet” -11

INCREASERIGHT On a number line, values INCREASE as you go RIGHT

Big Number > Little # Or Little # < Big NumberLittle # < Big Number

True or False? -5 < True

True or False? -6 < True

True or False? 6 < False

True or False? -6 > False

Write the integers –4, 5, 3, -2, and 0 from least the greatest , -2, 0, 3, 5

The Number Line Dance

Homework Page 57 (2-54) even Remember to write the problem!!