2-1 Adding Integers & Absolute Value

2-1 Adding Integers & Absolute Value

Introduced in L59

Warm Up

Estimate the vertical position of each sea animal, using eye level

Open Ended

The shark's vertical position is _______________

Learning & Habit Objectives

Learning: I will add integers and interpret absolute value using the number line

Habit: I will draw the number line and use it to solve problems

Success Criteria

• I know my vocabulary

• I can add integers on the number line

• I can work with the absolute value of integers

Notebook: Revisiting the Number Line

The integers are the whole numbers and their opposites. They do not include decimals or fractions.

Notebook: Absolute Value

The absolute value of a number is its distance to zero on the number line.

|8| = 8 and |-8| = 8 because both 8 and -8 are 8 units to zero.

We use absolute value to represent distances, which are always positive numbers.

Notebook: Integer Addition on the Number Line

Start at 0. Move left for negative and right for positive. We will practice in class.

Example (-5) + (-2)

Example (-3) + (6)

Multiple Choice

Evaluate |6-2|

• 4

• -4

Multiple Choice

Simplify (-8) + (-2)

• -10

• 10

• 6

• -6

Multiple Choice

Simplify (-9) + (6)

• 15

• -15

• 3

• -3

Multiple Choice

Compare |-4| ___ |4|

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• >

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