Lesson 1 Adding Integers Integers whole numbers that

Lesson 1 Adding Integers

Integers whole numbers that are • positive • negative • zero

Number line 0 Negative numbers < Positive numbers > 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. "

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

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

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!

= 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?

Worksheet Time Complete the practice problems.

Lesson 2 Subtracting Integers

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

= 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?

Worksheet Time Complete the practice problems.

Lesson 3 Subtracting Integers

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

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

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

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

Worksheet Time Complete the practice problems.