Integer Operations in Absolute Values
Presentation
•
Mathematics
•
7th Grade
•
Hard
Joseph Anderson
FREE Resource
7 Slides • 0 Questions
1
integer operations
by Fielo Carlos P Salcedo
2
ADDITION OF INTEGERS
HOW DO WE ADD INTEGERS?
1. If the integers have the same signs,
a. The sum of two positive integers is positive.
examples: 4 + 17 = 21
3 + 5 = 8
b. The sum of two negative integers is negative.
examples: -7 - 2 = -9
-3 + (-5) = -3 - 5 = -8
3
Add the following
1. 13 + 24 =
2. 16 + 18 =
3. 36 + 55 =
4. -25 - 64 =
5. (-57) + (-48) =
1. 37
2. 34
3. 91
4. -89
5. -105
4
2. if the integers have different signs
Subtract their absolute values. The sum is ...
a. positive if the positive integer has the greater value.
example: 36 + (-8) = ?
b. negative if the negative integer has the greater value.
example: 4 + (-9) = ?
5
Another easier way
Simplify first before adding or subtracting.
Make sure that each term has only one sign.
Add a negative +(-) = -
Subtract a positive -(+) = -
Add a positive +(+) = +
Subtract a negative -(-) = +
6
examples
1. 3 + (-4) = ?
= 3 - 4
= -1
2. 6 - (+4) = ?
= 6 - 4
= 2
3. -3 - (-4) = ?
= -3 + 4
= 1
4. -6 + (+4) = ?
= -6 + 4
= -2
5. 9 - (-4) = ?
= 9 + 4
= 13
6. -(-8) - (-4) = ?
= 8 + 4
= 12
7
More examples
1. 7 + (-7) = ?
= 7 - 7
= 0
2. -6 - (+14) = ?
= -6 - 14
= -20
3. 52 - (4) = ?
= 52 - 4
= 48
4. -24 + (-16) = ?
= -24 - 16
= -40
5. -29 - (24) = ?
= -29 -24
= -53
6. -(+8) + (-4) = ?
= -8 - 4
= -12
integer operations
by Fielo Carlos P Salcedo
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