Download day 1 adding integers teachers ed

Name________________________
Period______
Date____________
Unit 1: Simplifying Expressions
Day 1: Adding Integers / Absolute Value
Sponge
What are the vertical distances
between the following places?
P = Plane
1. B and P
12 m
2. F and B
B = Bird
5m
3. W and F
4. W and P
0m
F = Fish
-2m
W = Wreck
-9 m
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SWBAT #1: Add integers
At the end of the lesson, you will show what you learned today by:
 Taking a quiz
Tool Kit: Vocabulary and Concept
Fill in the following table using a “+” to represent +1 and a “-“ to
represent -1.
3
-2
7
-4
-3
0
How else can you represent 0? __________________________
Our representation of 0 is known as a __________________ and this is what we
are going to use to solve addition problems.
Use the “+” and “-“ symbols to find the sums of the following addition
problems.
negative numbers
numbers with opposite signs
-3 + -2
-1 + -5
-5 + 2
-1 + 4
-4 + -2
-7 + -8
4 + -2
7 + -3
Rule for finding the sum of
two negative numbers:
 Add
 Keep the sign
Rule for finding the sum of two
numbers with opposite signs:
 Subtract
 Keep the sign of the
“larger” number
SWBAT # 2: Simplify expressions with absolute value
Tool Kit: Vocabulary and Concept
Let’s try some together.
1.
2.
|7| =
4.
3.
|- 4| =
5.
6.
| 5| =
7.
- |32| =
8.
|6| - |-5| =
Your turn.
1.
|4| =
4.
|-45| + |5| =
12.
What is the absolute value of
3?
a. 3
b. -3
c. ⅓
d. -⅓
Which has the greatest
absolute value, 4 or -9?
2.
3.
- |8| =
- |-2| =
- |- 12| =
6.
- |30| =
8.
- |-17| =
|-12| - |-3| =
11.
5.
7.
- |-1| =
9.
- |-8| =
10.
|- 18| =
|-7| =
9.
|-35| - |6| =
|-10| + |-12| =
10.
11.
|16| + |-15| =
12.
|-19| - |18| =
|19| + |-41| =
13.
14.
15.
What is the absolute value of
-2?
Which has the greater
absolute value, -4 or ¾?
Which has the greater
absolute value, -9 or 2?
e.
f.
g.
h.
-2
2
½
-½
Sample Multiple Choice Problems
Strategies: 1. Eliminate wrong answers (distractors)
2. Show all work
Show all work and/or explain your reasoning.
1. Which of the following results
in a negative number?
A.
B.
C.
D.
2.
4.
– 7 + 10
9 + -2
4+5
-8 + - 12
A. $155
B. $200
C. $255
D. $245
17 + -33 =
A.
B.
C.
D.
16
-16
18
-18
5.
3.
Nelly is playing a game that lasts 3 days.
She wins money or loses money each day
depending on how well she plays. She wins
$417 on the first day, loses $281 on the second
day and wins $119 on the last day. How much
money does she have when the game is over?
Which has the greater absolute value, -6 or 3?
-12 + -7 + -13
A.
B.
C.
D.
-32
32
6
-6
A. -6
B. 3
C. Neither
D. They are the same