Presentation is loading. Please wait.

Presentation is loading. Please wait.

On Desk: 1.Pencil 2.Math Journal 3.Learning Log Learning Log: HW: WS -Adding & Subtracting Integers (D) Parent Sig. on SD – Log Unit Test returned after.

Similar presentations


Presentation on theme: "On Desk: 1.Pencil 2.Math Journal 3.Learning Log Learning Log: HW: WS -Adding & Subtracting Integers (D) Parent Sig. on SD – Log Unit Test returned after."— Presentation transcript:

1 On Desk: 1.Pencil 2.Math Journal 3.Learning Log Learning Log: HW: WS -Adding & Subtracting Integers (D) Parent Sig. on SD – Log Unit Test returned after retake? *Partner Quiz – Mon. 10/5 Math CC7/8 – Be Prepared

2 AN -Lesson 2.3 Learning Check – AN Inv. 1-2 Begin HW? Tasks for Today

3

4

5 -3 +3 Skip?

6 +3-3 Skip?

7 Any addition expression can be rewritten as subtraction by subtracting the opposite of the number being added. Skip?

8 Any subtraction expression can be rewritten as addition by adding the opposite of the number being subtracted.

9 Adding Integers Remember the rules? Positive + Positive = Negative + Negative = Positive + Negative = Negative + Positive = Positive Negative 1.Find the difference between the two numbers. 2.Take the sign of the number with the greater absolute value.

10 Subtracting Integers Subtracting an integer is the same as: Adding its opposite Therefore, Subtracting a positive is the same as: Adding a negative Subtracting a negative is the same as: Adding a positive Then, just use the addition rules to solve!

11

12 Learning Check – AN Inv. 1-2 Use your algorithms to find each sum or difference without using a calculator. 1)+12 - +3= 1)-75 + -30= 2)+45 - -60= 3)-9 - -9= 4)-25 - +15= 5)+11 + -5=


Download ppt "On Desk: 1.Pencil 2.Math Journal 3.Learning Log Learning Log: HW: WS -Adding & Subtracting Integers (D) Parent Sig. on SD – Log Unit Test returned after."

Similar presentations


Ads by Google