Download Add and Subtract Integers

Integers
All whole numbers and
their opposites including
the number 0
Add and
Subtract Integers
Rules
If the signs on the numbers are the
same……. Add the numbers
If the signs on the numbers are
different……. Subtract the numbers
Use the sign on the biggest number
for the sign in your answer
Adding
(-8) + (-9) = -17
(-5) + 11 = 6
(-1) + 15 + (-21) = -7
+ 14 + (-21) or
(-22) + 15
Evaluate: M + 8 (-12) + 8
When M = -12
-4
Rules
If the signs on the numbers are the
same……. Add the numbers
If the signs on the numbers are
different……. Subtract the numbers
Use the sign on the biggest number
for the sign in your answer
** You must fix double negatives
before you follow the rules above!!!!
Subtracting
- 7 - 7 = -14
+ 2 -+ (-4)
+ = 6
+
(-1) - 15 -+ (-21)
=5
-16 + 21 =
Evaluate:3 –+ (-X)
+
When X = -5
3+ X + 3+ (-5)= -2
Multiply and
Divide Integers
Multiply
(10) • (5) = 50
(10) • (-5) = -50
(-10) • (5) = -50
(-10) • (-5) = 50
Divide
(10) ÷ (5) = 2
(10) ÷ (-5) = -2
(-10) ÷ (5) = -2
(-10) ÷ (-5) = 2
Rules
A positive multiplied by a positive is a positive
+•+=+
A positive multiplied by a negative is a negative
+•-=A negative multiplied by a positive is a negative
-•+=-
A negative multiplied by a negative is a positive
-•-=+
Rules
A positive divided by a positive is a positive
+÷+=+
A positive divided by a negative is a negative
+÷-=-
A negative divided by a positive is a negative
-÷+=-
A negative divided by a negative is a positive
-÷-=+