a lil bit of help with math?

Question

in math when your doing multiplication if its a negative times a postive will it become a postive

also what are the rules for all of that with postives and negatives

thanks

Answer 1

You can also think of it this way

1.) a friend of a friend is a friend (positive * positive = positive)

2.) a friend of an enemy is an enemy (positive * negative = negative)

3.) an enemy of a friend is an enemy (negative * positive = negative)

4.) an enemy of an enemy is a friend (negative * negative = positive)


The rationale:

1 - generally, your friend's friend will also be your friend

2 - an enemy's friend will probably not be your friend

3 - a friend's enemy will be your enemy as well

4 - if you have an enemy, it may behoove you to make friends with their enemy

Of course people don't live by these rules, but it's an easy, rational way to think of it.

Answer 2

In multiplication, unlike signs (+, -) always yield a negative answer; and like signs (+, + and - , -) an positive result. Same rules apply to division.

Addition :
For unlike signs, subtract the lower number from the higher one. The sign of the higher number prevails.
Example :
5 + (-3) = 2
3 + (-5) = -2

Subtraction:
Change the sign of the subtrahend, then proceed to addition.
Example :
5 - (-3) = 5 + 3 = 8
3 - (-5) = 3 + 5 = 8
-5 - 3 = -5 + -3 = -8
-3 - (-5) = -3 + 5 = 2

Answer 3

Positive times Positive = Positive

Positive times Negative = Negative

Negative times Negative = Positive (they cancel eachother out)

Answer 4

no negative times positive is negative

negative times negative = positive
positive times positive equals positive
negative times positive is negative

Answer 5

+ x + = +
- x + = -
- x - = +

So a negative times a positive becomes negitive.

Answer 6

- * + = -
+ * + = +
- * - = +

Same for division.