Lesson 1 Adding Integers.

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Presentation transcript:

Lesson 1 Adding Integers

Integers whole numbers that are positive negative zero

Is zero positive or negative? Number line Negative numbers Positive numbers < zero > zero Is zero positive or negative? Neither

Absolute Value how far a number is from zero

One Rule for Adding & Subtracting Integers “Always go right on the number line unless you get turned around by a subtraction or negative sign."

3 + 8 3 Sample 1 (Adding) Step 1: Draw your number line and zero Step 2: Locate the beginning integer

Sample 1 continued (Adding) = go right 3 + 8 Step 3: Determine your direction. 3 11 Step 4: Count out your moves Step 5: The Answer. Where do you end up?

Sample 2 (Adding a Negative) -2 + (-8) Step 1: Draw your number line and zero -2 Step 2: Locate the beginning integer. You can not go left or right with your starting integer. It is what it is!

Sample 2 continued (Adding a negative) = go right = turn left -2 + (-8) Step 3: Determine your direction. -10 -2 Step 4: Count out your moves Step 5: The Answer. Where do you end up?

Complete the practice problems. Worksheet Time Complete the practice problems.

Lesson 2 Subtracting Integers

-2 - 8 -2 Sample 3 (Subtracting) Step 1: Draw your number line and zero -2 Step 2: Locate the beginning integer

Sample 2 continued (Subtracting) = turn left -2 - 8 Step 3: Determine your direction. -10 -2 Step 4: Count out your moves Step 5: The Answer. Where do you end up?

Complete the practice problems. Worksheet Time Complete the practice problems.

Lesson 3 Subtracting Integers

2 - (-8) 2 Sample 3 Step 1: Draw your number line and zero Step 2: Locate the beginning integer.

2 - (-8) 2 10 Sample 3 continued = turn left = turn right Step 3: Determine your direction. 2 10 Step 4: Count out your moves Step 5: The Answer. Where do you end up?

-2 - (-5) -2 Sample 4 Step 1: Draw your number line and zero Step 2: Locate the beginning integer.

-2 - (-5) -2 3 Sample 4 continued = turn left = turn right Step 3: Determine your direction. -2 3 Step 4: Count out your moves Step 5: The Answer. Where do you end up?

Complete the practice problems. Worksheet Time Complete the practice problems.