### Adding and Subtracting Integers

```Adding and Subtracting Integers
Observe,
Question,
Comment
08/15/13
08/16/13
Integers
Integers Reflection
Warm-Up:
3L
3R
Warm-Up
1)
7 – (-4)
2)
-9 + 3
3)
-8 + (-5)
4)
-5 - 2
Observe,
Question,
Comment
08/15/13
08/16/13
Integers
Integers Reflection
Warm-Up:
3L
Standard:
3R
Content Standards
• NS 1.2 Add, subtract, multiply, and
divide rational numbers (integers)
Observe,
Question,
Comment
08/15/13
08/16/13
Integers
Integers Reflection
Warm-Up:
Standard:
Objective:
3L
3R
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)
Observe,
Question,
Comment
08/15/13
08/16/13
Integers
Integers Reflection
Warm-Up:
Standard:
Practice:
Objective:
Notes/Examples:
3L
3R
Party or War?
• The addition symbol does not always mean to
• 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
7) -6 – 0
8) 2 – (-6) 9) (-3) – (-9)
10) -12 – (-7)
6) 0 – (-4)
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 • 80 - 112
+
• 924 - 500
-25
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
3. -22
1. 5
2. 34
4. -11
5. -6
6. 48
7. -28
8. -8
9. -15
10. -1404
11. 328
12. -3744
```