Theresa added negative seventeen plus negative twelve and got the answer . 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: negative seventeen plus negative twelve.

Question

Theresa added negative seventeen plus negative twelve and got the answer . 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: negative seventeen plus negative twelve.

anonymous · Answer

Please help me :(((((

anonymous · Answer

@marissa123478 so it's -17 + (- 12) correct? so - 17 - 12 = - 29.

anonymous · Answer

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: negative seventeen plus negative twelve.

anonymous · Answer

those are the choices

anonymous · Answer

@mrs_quezon

anonymous · Answer

@marissa123478 there's no error. =)