Equations: What am I doing wrong?

Question

13 + (-12) - (-5)

Wouldn't the 13 be a positive number? If so; 13 and -12 are different- thus, you would subtract.

13-12= -1
-1 - (-5) : the same... so you would add = -6

But supposedly the answer is 30. What am I doing wrong?
Explain please

Thank you

grey- I can see how it is positive 1 (+1)
Because you take the sign (- or +) from the larger number (wich would be 13).

Heres the link to my question: http://answers.yahoo.com/question/index?qid=20061116132711AAYcxiB

They were all adding it... idiots?

But...

+1 - (-5) = 4

They have different signs so that would be subtraction. 4 isn't an option :/

Answer 1

13 + (-12) - (-5) is the same as: 13 -12+5 = 6

Answer 2

there isn't a need to put the 12 in parenthesis
it is just 13 - 12 which equals 1
then 1 - (- 5) with that i usually change the signs to make it plus to solve easier, so you don't see the one because it isnt necessary to put but if you look at it you could also see it as
1 - 1(- 5)
so then you take - 1 and multiply it by - 5 which equals positive 5 so that gives you the equation :
1 +5 which equals 6

so unless your looking at the problem wrong there is no way it could be 30
the only way i can think of if the problem is actually
13 + 12 - (-5)
that would give you 30

Answer 3

first off, 13-12 does not equal -1, it equals 1.
The equation the way you wrote it equals 6 (positive). There must be some typo if the answer is supposedly 30.