# Adding and Subtracting Integers. Adding and Subtracting Integers 3R 3L Adding and Subtracting Integers Reflection Observe, Question, Comment 08/16/1308/15/13.

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Adding and Subtracting Integers 3R 3L Adding and Subtracting Integers Reflection Observe, Question, Comment 08/16/1308/15/13 Warm-Up:

Warm-Up 1)7 – (-4) 2)-9 + 3 3)-8 + (-5) 4)-5 - 2

Adding and Subtracting Integers 3R 3L Adding and Subtracting Integers Reflection Observe, Question, Comment 08/16/1308/15/13 Warm-Up: Standard:

Content Standards NS 1.2 Add, subtract, multiply, and divide rational numbers (integers)

Adding and Subtracting Integers 3R 3L Adding and Subtracting Integers Reflection Observe, Question, Comment 08/16/1308/15/13 Warm-Up: Standard: Objective:

To add and subtract integers. Math Link: You know how to compare and order positive and negative numbers. Now you will learn to add, subtract, multiply and divide them.

Vocabulary: Integers The set of positive whole numbers, their opposites, and zero. (Ex: -2, -1, 0, +1, +2)

Adding and Subtracting Integers 3R 3L Adding and Subtracting Integers Reflection Observe, Question, Comment 08/16/1308/15/13 Warm-Up: Standard: Objective: Notes/Examples: Practice:

Party or War? The addition symbol does not always mean to ADD! The subtraction symbol does not always mean to SUBTRACT!

Problems to Write and Work on the Whiteboard [Party or War?] 2 + 4-1 – 7-3 + (-4)5 – (-3) 2 + -75 + 3-4 + (-8)9 + -5 -3 – 71 – (-8)-7 – (-7)5 – (-5) 7 – 4 5 – 8-10 + 12-7 – (-2)

Think of a PARTY when integers have the SAME SIGN... 1.Is it a positive or negative party? 2. ADD the integers.

Think of a WAR when integers have DIFFERENT SIGNS... 1.Who will win? Is there more positives or negatives? 2.SUBTRACT the two integers. 3. Remember your sign!

You Do: Adding Integers (1) - 4 + - 4(2) + 7 + - 8(3) + 1 + - 7 (4) + 3 + - 6(5) - 2 + - 3(6) 0 + - 7 (7) - 6 + + 2(8) - 4 + - 5(9) + 2 + - 4

You Do: Adding Integers (1) - 8(2) - 1(3) - 6 (4) - 3(5) - 5(6) - 7 (7) - 4(8) - 9(9) - 2

You Do: Subtracting Integers 1) 8 – 8 2) 8 – 10 3) 0 – 7 4) -5 – 15) -2 – 26) 0 – (-4) 7) -6 – 08) 2 – (-6) 9) (-3) – (-9) 10) -12 – (-7)11) 10 – (-4)

You Do: Subtracting Integers (1) 0(2) - 2(3) - 7 (4) - 6(5) - 4(6) + 4 (7) - 6(8) + 8(9) + 6 (10) - 5(11) + 14

Big Number Practice 100 + -25 -80 + -112 + 924 + -500

You Do: Big Numbers - 756 + 398 - 756 + - 398 3138 + - 2149 3138 + + 5149

You Do: Big Numbers - 756 + 398 = -358 - 756 + - 398 = -1154 3138 + - 2149 = 989 3138 + + 5149 = 8287

Big Number Practice 100 - - 25 - 80 - - 112 + 924 - - 500

You Do: Big Numbers - 756 - 398 - 756 - - 398 3138 - - 2149 3138 - + 5149

You Do: Big Numbers - 756 – 398= -1154 - 756 - - 398= -358 3138 - - 2149= 5287 3138 - + 5149= - 2011

Copy Homework Time [Due Next Meeting] - 2 + 79 – 13- 11 + (-2)4 + 6 - 4 – 9- 9 + 0-12 + 57 + 11 - 8 + 10- 7 + (-9)- 9 – (-12)- 3 – 3 - 12 + 7- 6 – 2320 – (-20)- 3 + 8 - 16 - (-25)- 17 – 12

Copy Homework Time [Due Next Meeting] - 2 – 5 – 9 -2-10 + 2 – 4-6 12 – (-4) + 3 - 20 – 20 – 20 - 1 – 10 + 12 – 1- 3 – 2 – 8 – (-10) 3 – 5 – 10 + 810 + 3 – (-8) 2 – (-9) – 8- 100 – 100 + 1

Review 1. - 7 + 122. 35 +( - 1)3. - 10 + ( - 12) 4. - 6 + - 55. 0 + - 66. 50 + ( - 2) 7. - 31 + 38. 4 + ( - 12)9. - 23 + 8 10. - 1928 + 524 11. 347 + ( - 19) 12. - 3723 + - 21

Review 1. 52. 343. - 22 4. - 115. - 66. 48 7. - 288. - 89. - 15 10. - 1404 11. 328 12. - 3744