adding subracting positive and negitive numbers?

Question

positive + a positive = a positive
a negitive = a negitive = a positive
what about like positive + a negitive (10 +-5=)
negitive -positive ( -5-10=)
positive - a negitive( 10--5)
and any of the other things related to this i missed
i hate this i cant do it help me

Answer 1

Big papa has it right but this might help too.
-5 - 10 is the same as -5 + -10 which is equal to -15.

10 - -5 can be changed to 10 + -5 which is equal to 5.

You can do it!

Excellent explanation nattiesoo!

Answer 2

All you have to do is switch the signs to make the other number positive or negative to make them match. If you have 10 + -5 then you would make it 10 - 5. If you have -5 - 10 then you would say -5 + - 10 = -15. A negative plus a negative will always be a negative just as a postive plus a postive will always be postive. 10 - -5 = 10+5 and would than equal postive fifteen two negatives cancel each other out because if you are subtracting a negative you are adding a postive. Get it?

Answer 3

positive + positive = always positive (just add)
(+3) + (+4) = (+7)

positive - positive = can be either positive or negative. if the bigger number is first, then the answer is positive. if the bigger number is second, then the answer is negative

negative + negative = always negative (ignore the + sign)
(-3) + (-5) = -8

positive + negative = will be the difference, with the sign determined by which ever number is bigger
(+3) + (-5) = -2
(+5) + (-3) = +2

positive - positive = will be either positive or negative. if the bigger number is first, then the answer is positive, if the bigger number is second, then the answer is negative

positive - negative = subtracting a negative is the same as adding it
(+3) - (-5) is the same as (+3) + (+5)

negative - negative = since subtracting a negative is the same as adding, its the same as adding a positive and negative
(-3) - (-5) is the same as (-3) + (+5)

Answer 4

attempt this. Draw a range line (or imagine it on your head obviously) that has a favorable and damaging side with 0 contained in the middle. Like a lengthy piece of string. you won't be able to get off the string, you could purely flow left (damaging) or precise (effectual). you initiate on the string/variety line with the first variety. Say 10. if you're subtracting, you'll flow left (in direction of 9 and eight etc). So, 10 - 3 strikes left to 7. Now, what about 10 - a damaging 3? nicely, you initiate transferring left, yet the different negatives says turn round. you ultimately end up transferring precise. 10 - - 3 = 13. once you've 10 - - - 3, you would possibly want to turn round two times and finally end up going left. This similar element works even if you're going decrease to and fro previous 0. So, 3 - 10 skill flow 10 steps left to -7. and three--10 skill flow precise to 13.

Answer 5

this is how my fav. math teacher taught me
SUBTRACTING NEGATIVES.
(if you get adding)

SOOY!

Same. Opposite. Opposite.YIPPIE!

easy SOOY
(pronounced soo-ey)

so like
you just make it into an addition problem

ex..

5 - (-10)=
keep the 5 the same sign
switch the neg into a pos
then switch the -10 to the opposite (+10)
and YIPPIE!
15

it takes some practice w/ these kinds of probs

Answer 6

the 10+-5 would equal 5
-5-10 equals -15
10--5 equals 15

Answer 7

1 + 1 = 2
1 - (-1) = 2
1 + (-1) = 0
(-1) - 1 = -2
(-1) - (-1) = 0

Just remember 2 subtracting a negative is adding and adding a negative is subtracting.