integers????????

Question

why would you add the opposite if its subtaction

Answer 1

Consider the meaning of subtraction -- it is nothing but the inverse of addition. What a-b means is "the unique number c such that c+b = a". Now, you (should) know that for any number b, b+(-b) = 0 (this is in fact what the symbol -b means). So suppose that c = a+(-b) -- then c+b = a+(-b)+b = a+0 = a. Thus c is a number such that c+b = a, which means that c = a-b by definition.

You may be interested to know that in more formal contexts, subtraction is actually defined to be addition of the additive inverse, so a-b = a+(-b) by definition.

Answer 2

for example:

3+x=15

first, you must get x by itself on one side
so, since 3 is a positive number, you must do it's opposite to have zero so that x is by itself. Now, remember that what you do to one side, you must do to the other (that means on each side of the equal sign), so since you subtracted 3 from 3, you must subtract 3 from 15 to get your answer.

3+x= 15
-3 -3
________
x = 12

do you understand? by the way, the three is supposed to be under 15 lol

Answer 3

I am sorry what is the question? The reason would be because the question was add this negative integer to this whatever.

Answer 4

because subtracting a positive and adding a negative are the same thing

4-1=3
4+(-1)=3

its confusing at first but youll get it eventually. trust me i felt the same about it

Answer 5

What grade are you in?


i think your saying -(-6) something like that have you heard the phrase double negative same thing it's to trick you basically.

Answer 6

leave change oppisite

Answer 7

because math is gay that way.. =[
I'm doing integers right now too..

Answer 8

(-)(-) = +
(+)(-) = -
(+)(+) = +