Integer Operation Rules:
Adding Integers
• If the signs are the same, add the numbers and keep the sign.
(Same signs, find the Sum) 5 + 9 = 14
-3 + -6 = -9
• If the signs are different, find the difference between the numbers
and keep the sign of the number with the greater absolute
value.
(Different signs, find the Difference/Subtract)
Examples:
-12 + 5 = -7
-11 + 12 = 1 Subtracting Integers
• Change the subtraction sign to an addition and change the sign of the
second number to its opposite. Then follow the rules for addition.
(Add
a line, change the sign)
Examples:
6 – 4 6 + -4 = 2
-10 - -8 -10 + 8 = -2
Integer Operation Rules Con’t:
Multiplying and Dividing Integers
• Multiply or divide.
• If there are an odd number of negatives, your answer will be negative.
(Unlike signs = negative)
• If there is an even number of negative signs, your answer will be
positive. (Same/Like signs = positive)
Examples:
-5 • -3 = 15 (2 neg. signs = pos. answer)
(-1)(5)(2) = -10 (1 neg. sign = neg. answer)
-56 ÷ -8 = 7 (2 neg. signs = pos. answer)
-16
4
= −4 (1 negative sign = neg. answer)
All Operations:
1) 50 - -10 = ________
2) (-3)(2)(-4) = ________
3) 26 + -48 = ________
4) 240 ÷ -8 = ________
5) (0)(-77) = _______
6) -221 – 93 = _______
7) -3 + -14 = _______
8) -288 ÷ -24 = ________
9) -39 + -22 + 11 = _______
10) -54 - -54 = ________
11) -2 • -2 • -3  -1  -2 -1  2 =________
12) 17 - -36 – 63 – 29=_______
13)
-36
=______
12
14) -3 - -4 + 7 – 12 = _______
15) -38+20+-12+-46+80=_______
16) -28 • -52 = _______
17) -76-1= _______
18) 0 ÷-4 = _______