Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers. Bell Ringer Write.

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Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers. Bell Ringer Write each expression then solve: 1.positive 3 increased by negative twenty 2.negative eight decreased by negative seven 3.the sum of the opposite of -14 and the opposite of -(-4)

Addition Rule 1) When the signs are the same, ADD and keep the sign. (-2) + (-4) = -6 2) When the signs are different, SUBTRACT and use the sign of the larger number. (-2) + 4 = (-4) = -2 Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

Karaoke Time! Sung to the tune of “Row, row, row, your boat” Same signs add and keep, different signs subtract, keep the sign of the higher number, then it will be exact! Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

= ? Answer Now

-6 + (-3) = ? Answer Now

The additive inverses (or opposites) of two numbers add to equal zero. -3 Proof: 3 + (-3) = 0 We will use the additive inverses for subtraction problems Example: The additive inverse of 3 is Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

What’s the difference between and 7 + (-3) ? = 4 and 7 + (-3) = 4 The only difference is that is a subtraction problem and 7 + (-3) is an addition problem. “SUBTRACTING IS THE SAME AS ADDING THE OPPOSITE.” (Keep-change-change) Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

When subtracting, change the subtraction to: adding the opposite (keep-change-change) and then … follow your addition rule. Example #1: (-7) (+7) Diff. Signs --> Subtract and use larger sign. 3 Example #2: (-7) Same Signs --> Add and keep the sign. -10 Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

11b + (+2b) Same Signs --> Add and keep the sign. 13b Okay, here’s one with a variable! Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers. Example #3: 11b - (-2b)

Which is equivalent to -12 – (-3)? Answer Now

7 – (-2) = ? Answer Now

1) If the problem is addition, follow your addition rule. 2) If the problem is subtraction, change subtraction to adding the opposite ( keep-change-change ) and then follow the addition rule. Review: Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

Absolute Value of a number is the distance from zero. Distance can NEVER be negative! The symbol is |a|, where a is any number. Link: 3_content/wl-book-demo/ph-145s.html Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

Examples  7  =  10  =  -100  =   =  -3  = 3 Objective: SWBAT: 1. State the coordinate of a point on a number line. 2. Graph integers on a number line. 3. Add and subtract integers.

|7| – |-2| = ? Answer Now

|-4 – (-3)| = ? Answer Now Purple