If the signs are the same, add
normally and keep that sign.
EXAMPLES:
5 + 7
= 12
A tip for adding
integers: It's like counting
on a number line. When
you add a positive, you
go to the right. When
you add a negative,
you count to the left.
-12 + -10
= -22
Different Sign
If the signs are different, subtract and
take the sign from the bigger number.
EXAMPLES:
-25 + 30
= 5
4 + -18
= -14
Subtraction
Same Sign
Add the opposite of the second
term then follow the adding rules.
EXAMPLES:
76 - 70
= 6
-13 - (-5)
= -8
Different Sign
Add the opposite of the second
term then follow the adding rules.
EXAMPLES:
-16 - (8)
= -24
20 - (-9)
= 29
Multiplication
Same Sign
If the signs are the same, the
answer is positive.
EXAMPLES:
6 x 4
= 24
-7 x -8
= -56
Different Sign
If the signs are different, the
answer is negative.
EXAMPLES:
-16 x 2
= -32
3 x -11
= -33
Division
Same Sign
If the signs are the same,the
answer is positive.
EXAMPLES:
35 ÷ 5
= 7
-28 ÷ -2
= 14
Different Sign
If the signs are different, the
answer is negative.