Marcos added +12 + -11 and got the answer -1. What error did Marcos make?

Question

anonymous · Answer

alright that's fluttered up. Don't post that pellet on my question status comments.

jim_thompson5910 · Answer

+12 + -11 is the same as 12 - 11

jim_thompson5910 · Answer

since adding a negative is the same as subtracting

anonymous · Answer

His error a that he added wrong

anonymous · Answer

*was that

anonymous · Answer

He found the difference of the numbers instead of the sum.

 He divided the integers.

 He chose the incorrect sign for the sum.

 He multiplied the integers.

anonymous · Answer

those are the multi choices^

jim_thompson5910 · Answer

Are you sure the problem isn't  -12 + -11 ?

anonymous · Answer

+12 + -11 and got the answer -1.

jim_thompson5910 · Answer

+12 + -11 is the same as 12 - 11 = 1

so he should have gotten 1 (not -1) as the answer

anonymous · Answer

I'm confused because none of the those multi choice answers are correct

jim_thompson5910 · Answer

Yeah those choices don't really fit. What he should do is find the difference of the numbers and make that result positive (since 12 is positive and larger than 11, which is negative)