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Integers_add_subt

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How to add integers and subtract integers. Mainly working with positive and negative numbers.

How to add integers and subtract integers. Mainly working with positive and negative numbers.

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