About Adding Integers:
To add integers we think about two different scenarios. When the signs are the same, add the absolute values and keep the sign the same. When we have different signs, subtract the smaller absolute value from the larger and keep the sign of the number with the larger absolute value.
Test Objectives
- Demonstrate the ability to add integers with a common sign
- Demonstrate the ability to add integers with different signs
- Demonstrate the ability to add integers using a number line
#1:
Instructions: Add each using a number line.
a) -5 + (-7)
b) -6 + (-8)
c) -2 + 4
Watch the Step by Step Video Solution View the Written Solution
#2:
Instructions: Add each using a number line.
a) -7 + 14 + (-11) + 4
b) -5 + 2 + (-6) + 1 + (-3)
Watch the Step by Step Video Solution View the Written Solution
#3:
Instructions: Find each sum.
a) -15 + (-30)
b) -2 + (-8) + (-17)
c) -4 + (-7) + (-1)
d) -12 + (-22) + (-13) + (-40)
Watch the Step by Step Video Solution View the Written Solution
#4:
Instructions: Find each sum.
a) 6 + (-7)
b) -4 + 3
c) 12 + (-1)
d) 15 + (-9)
e) 34 + (-28)
Watch the Step by Step Video Solution View the Written Solution
#5:
Instructions: Find each sum.
a) -25 + 17 + (-27) + 60
b) -40 + 15 + (-22) + (-18) + 55
c) 4 + (-7) + 3 + (-8) + 2 + (-9) + 1 + (-10)
Watch the Step by Step Video Solution View the Written Solution
Written Solutions:
#1:
Solutions:
a) -5 + (-7) = -12
b) -6 + (-8) = -14
c) -2 + 4 = 2
Watch the Step by Step Video Solution
#2:
Solutions:
a) -7 + 14 + (-11) + 4 = 0
b) -5 + 2 + (-6) + 1 + (-3) = -11
Watch the Step by Step Video Solution
#3:
Solutions:
a) -15 + (-30) = -45
b) -2 + (-8) + (-17) = -27
c) -4 + (-7) + (-1) = -12
d) -12 + (-22) + (-13) + (-40) = -87
Watch the Step by Step Video Solution
#4:
Solutions:
a) 6 + (-7) = -1
b) -4 + 3 = -1
c) 12 + (-1) = 11
d) 15 + (-9) = 6
e) 34 + (-28) = 6
Watch the Step by Step Video Solution
#5:
Solutions:
a) -25 + 17 + (-27) + 60 = 25
b) -40 + 15 + (-22) + (-18) + 55 = -10
c) 4 + (-7) + 3 + (-8) + 2 + (-9) + 1 + (-10) = -24
