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2.2 Adding Integers
Use a number line to help visualize the addition of
integers.
25  7
63 9
 2   4    6
2.2 Adding Integers
Use a number line to help visualize the addition of
integers.
4   3  1
83  5
2.2 Adding Integers
Add the following integers.
8  7  15
 12   30    42
9   10    1
 54  20 
 3   19 
 2  29  27
83  5
 22
 32
18   18  0
6   2    15 
4   15 
 11
2.2 Adding Integers
Evaluate the Algebraic Expressions
x  3 y for x  6 and y  2
 6  32
 6  6
0
x  y for x  13 and y  9
 13   9
 22
2.2 Adding Integers
If the temperature was -7 degrees (Fahrenheit) at 6 AM,
rose 4 degrees by 7 AM and then rose another 8 degrees
by 8 AM, what was the temperature at 8 AM?
 7 rose 4 rose 8
7 48
38
5 F
2.3 Subtracting Integers
Use a number line to help visualize the subtraction of
integers.
10  4  10   4   6
 8  2   8   2    10
9 15  9   15   6
2.3 Subtracting Integers
Subtract the following integers.
13  4  9
 14  5   19
 7  4   11
 3   4  
12   17  
12 17 
29
 9   1   8
3 4 
1
69  3
 6  5  2   3 
 11  2   3 
 13   3 
 13  3   10
2.3 Subtracting Integers
Evaluate the following expressions and problems.
Subtract 6 from  15
 15  6   21
8   2   9   7  
8297 
697 
3 7 
4
2.3 Subtracting Integers
Evaluate the Algebraic Expressions
x  y for x  5 and y  13
 5  13 
 18
3 y  z for y  9 and z  4
39    4  
27   4  
27  4  31
2.3 Subtracting Integers
The highest point in Asia is the top of Mount Everest, at a
height of 29,028 feet above sea level. The lowest point is
the Dead Sea, which 1312 feet below sea level. How
much higher is Mount Everest than the Dead Sea?
29,028   1,312  
29,028  1,312 
30,340 feet
2.4 Multiplying and Dividing Integers
Multiplying Integers
The product of two numbers having the same sign is a
positive number.
    
    
The product of two numbers having different signs is a
negative number.
    
    
2.4 Multiplying and Dividing Integers
Evaluate the following:
 3  8   24
 5 2   10
0   20   0
10 5   50
8 6  2  
 48 2  
96
 9 2 1 
181 
 18
2.4 Multiplying and Dividing Integers
Evaluate the following:
 3 4 5 1 
12 5 1 
 60 1 
60
2
3

222 
8
 2 
 2   2   2 
4 2    8
3
 82 
 88 
 64
2.4 Multiplying and Dividing Integers
Dividing Integers
The quotient of two numbers having the same sign is
a positive number.
   
 
   
 
The quotient of two numbers having different signs is
a negative number.
   
 
   
 
2.4 Multiplying and Dividing Integers
Evaluate the following:
42
 6
7
 80
 8
10
 16   2  
 16
 8
2
6
 undefined
0
0

7
0
2.4 Multiplying and Dividing Integers
Evaluate the following:
xy for x  5 and y  8
5 8 
 40
x
for x  12 and y  3
y
 12

3
4
2.4 Multiplying and Dividing Integers
A card player had a score of -13 for each of four games.
What was the total score?
 13 4 
 52