What is the rule for negative numbers. When added, subtracted, multiplied and divided?

Question

When is the answer positive, when is it negative?

Answer 1

Start with english- "I never did nothing !"
If you NEVER did nothing, you must have done something...
On with the show...

A -ve, PLUS -ve, equals a bigger -ve.
A -ve, MINUS a -ve, equals a smaller -ve.

A -ve TIMES a -ve is positive !
And..
A -ve DIVIDED by a -ve is also positive !

Answer 2

it's simple... just write it out like below:

3+(-2)
5-(-4)
3*(-6)
8/(-2)
that is put the negative no. with it's sign in a bracket

and then follow this rule
for addition & subtraction if the two signs are together like below,
+,+ = +
+,- = -
-,+ = -
-, - = +
that is when u see a + & - side by side u can remove both and use a - instead

conversely the others as above

for multiplication or division, u have to check the signs on both numbers, and use the below rule:
+,+ = +
+,- = -
-,+ = -
-,- = +

thet is while multiplying 2 positive numbers, the result will be positive etc.

that is if you

Answer 3

negative multiply by a negative= positive
negative multiply by a positive= negative
positive multiply by a negative= negative
positive multiply by a negative= negative

Division is basically the same.

Answer 4

adverse/adverse = helpful adverse*adverse = helpful you are able to write -4/-5 like -a million*4/-a million*5 = 4/5 and because -a million*-a million = +a million -4 * -5 = -a million*4 * -a million* 5 = (-a million*-a million)*4*5= a million*4*5=20 including: (+-) remains (-) -4 + -5 = no longer the rest than -4 -5 = -9 substracting: (--) = (+) -4 --5 = -4+5 = a million

Answer 5

if there are two signs the same (eg a + and a + or a - and a -) the answer will be positive,

if they are different (a + and a - ) the answer will be negative

thats how i remember it