1 Lesson 1.1.2 Adding and Subtracting Integers Adding and Subtracting Integers.
Adding and Subtracting Integers. Adding and Subtracting Integers 3R 3L Adding and Subtracting...
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Adding and Subtracting Integers
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Transcript of Adding and Subtracting Integers. Adding and Subtracting Integers 3R 3L Adding and Subtracting...
Adding and Subtracting Integers
Adding and SubtractingIntegers
3R3L
Adding and SubtractingIntegers Reflection
Observe,Question,Comment
08/16/1308/15/13
Warm-Up:
Warm-Up1) 7 – (-4)
2) -9 + 3
3) -8 + (-5)
4) -5 - 2
Adding and SubtractingIntegers
3R3L
Adding and SubtractingIntegers 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 SubtractingIntegers
3R3L
Adding and SubtractingIntegers Reflection
Observe,Question,Comment
08/16/1308/15/13
Warm-Up: Standard:
Objective:
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 SubtractingIntegers
3R3L
Adding and SubtractingIntegers 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 + -7 5 + 3 -4 + (-8) 9 + -5
-3 – 7 1 – (-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 – 1 5) -2 – 2 6) 0 – (-4)
7) -6 – 0 8) 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 + 7 9 – 13 - 11 + (-2)
4 + 6
- 4 – 9 - 9 + 0 -12 + 5 7 + 11
- 8 + 10 - 7 + (-9) - 9 – (-12) - 3 – 3
- 12 + 7 - 6 – 23 20 – (-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 + 8 10 + 3 – (-8)
2 – (-9) – 8 - 100 – 100 + 1
Review
1. -7 + 12 2. 35 +(-1) 3. -10 + (-12)
4. -6 + -5 5. 0 + -6 6. 50 + (-2)
7. -31 + 3 8. 4 + (-12) 9. -23 + 8
10. -1928 + 524 11. 347 + (-19) 12. -3723 + -21
Review
1. 5 2. 34 3. -22
4. -11 5. -6 6. 48
7. -28 8. -8 9. -15
10. -1404 11. 328 12. -3744
