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Adding Integers
0…-5,-4,-3,-2,-11,2,3,4,5...
Got It! GREAT!
The Positive and Negative of it All…
Get It! Got It! GREAT!
Integers
What is an Integer?Integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5… and their opposite numbers less than zero: -1,-2,-3,-4,-5…Integer is 17 Opposite is -17
Integer is -8Integer is 23
Opposite is 8Opposite is -23
Integers
Integers on a Number Line
0…-5,-4,-3,-2,-11,2,3,4,5...
Negative Integers are opposite whole numbers less
than zero: -1,-2,-3,-4,-5…
Positive Integers are whole numbers greater than zero: 1,2,3,4, 5…
Integers
How to add positive & positive integers
3 5+Positive Integers are whole numbers greater than zero: 1,2,3,4, 5…
Integers
They are BOTH positive Therefore… add numbers
And
KEEP IT POSITIVE!
3 5+1 2
3 4 56 7
8
Integers
-3 5+
How to add negative & negative integers
• Negative Integers are opposite whole numbers
less than zero: -1,-2,-3,-4,-5…
They are BOTH negative Therefore… add numbers
And
KEEP IT NEGATIVE!
Integers
-3 -5+ -1-2
-3-4-5-6-7-8
Integers
How to add negative & positive integers
-3 5+
Integers
Notice how positive and negatives are opposites going two different
directions
-1
1
Notice how positive and negative touch ends or points but don’t point in the same direction.
Integers
…-5,-4,-3,-2,-1 1,2,3,4,5...0
00
Integers
Positive 1/negative -1 cancel out to zero.
0 0As pernumber line
1
-1
Positive 1/positive 1 & negative -1/negative -1follow the same direction and increase 2 or decrease -2.-1+ -1=
-21+1= 2
Integers
-3 5+Adding negative & positive
integers
Integers
-3 5+1
5-3=25 is bigger and positive so answer must be positive.
200 0
Hint: Subtract both numbers and keep the sign of the bigger whole number.
Integers
Subtracting IntegersAdding and subtracting integers is almost identical. We convert the subtraction symbol to addition and give the following number its opposite sign.
5 - 7Change – to + and opposite of 7 is -7
5 + -7
-2 - 3
= -2
-2 + -3
= -5Change – to + and opposite of 2 is -2 -2 – -8 -2 +
8= 6
Change – to + and opposite of -8 is 8
References
Copyrighted and created by Susan Blakely
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