(3.9-5.8)-(-1/45-7/9)+1.1 ?!?!

Question

(3.9-5.8)-(-1/45-7/9)+1.1 ?!?!

Answer 1

(3.9-5.8)-(-1/45-7/9)+1.1=-1.9-(-1/45-35/45)+1.1=-0.8+4/5=-8/10+8/10=0