Theresa added -17 + -12 and got the answer -29. What error did Theresa make?

She found the difference of the numbers instead of the sum.

She changed the sign of the number 17 instead of the number 12.

She chose the incorrect sign for the sum.

She did not make an error: -17 + -12 = -29

Question

Theresa added -17 + -12 and got the answer -29. What error did Theresa make?

She found the difference of the numbers instead of the sum.

She changed the sign of the number 17 instead of the number 12.

She chose the incorrect sign for the sum.

She did not make an error: -17 + -12 = -29

anonymous · Answer

The last one. D. Although the 29 should be negative.

anonymous · Answer

@arilove1d Do you agree ?

anonymous · Answer

I'll give you a medal once she agree's .

anonymous · Answer

The answer choice for the last one is it 29 or -29

anonymous · Answer

Ooh my bad !

uri · Answer

It's D she did not make an error.

anonymous · Answer

Its D then Teresa did not make an error

anonymous · Answer

Ok

anonymous · Answer

Thanks to all of yall who helped me ! especially April though <3