ADDITION OF INTEGERS
If the signs are the same, what are you supposed to do?
(addition)
You are supposed to add the numbers and keep the signs
No matter what numbers or what the signs are, what are you supposed to do?
KEEP CHANGE CHANGE
If there is an odd number of negatives in the problem, then what are you supposed to do?
The answer has to begin with the negative symbol (-)
A negative # divided by a positive # would have an answer of negative or positive?
NEGATIVE
Can integers just be positive numbers? Can they just be negative numbers? Or can they be BOTH positive and negative numbers?
They can be BOTH
If the signs are different, what are you supposed to do?
(addition)
You are supposed to subtract the numbers and KEEP the sign of the LARGER absolute value.
Practice-
-5+(-3)=
-2
because...keep change change
If there is an even number of negatives in the problem, then what are you supposed to do?
Your answer is supposed to be a positive number
a negative # divided by a negative # would be an answer of negative or positive?
POSITIVE
What is 5x(-4)?
-20
Practice-
1+15=
16
Practice-
8-4=
4
Practice-
5x4=
20
a positive # divided by a negative # would be an answer of negative or positive?
NEGATIVE
what is 120 divided by -6?
-20
Practice-
(-6) - (-17)=
11
Practice-
(-3)-5=
-8
Practice-
7x(-2)=
-14
Practice-
-100 divided by 20=
-5
what is 23+(-21)?
2
Practice-
19-(-2)=
21
Practice-
19-(-5)=
24
Practice-
-5x(-7)=
35
What is one very easy way to remember how to do division of integers?
If both numbers have the same sign, then the answer is a positive number.
If the signs are different, then the answer is a negative number.
What is -500+(-243)?
-473