What's 5 and 2 / 5 minus 8

What's 5 and 2 / 5 minus 8


Five and two fifths, eight
=5.4+(-8)
= -2.6



How much is 0 minus 1 plus 1? 2 or 1?
The teacher said it's equal to one, I don't think it's right


0-(-1)+1=2
Teacher 2