2.75-[(-1/2)-(-5/6)+(-3/8)] +4又2/3=?

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2.75-[(-1/2)-(-5/6)+(-3/8)]+4又2/3=?2.75-[(-1/2)-(-5/6)+(-3/8)]+4又2/3=?2.75-[(-1/2)-(-5/6)+(-3/8)]+4又

2.75-[(-1/2)-(-5/6)+(-3/8)] +4又2/3=?
2.75-[(-1/2)-(-5/6)+(-3/8)] +4又2/3=?

2.75-[(-1/2)-(-5/6)+(-3/8)] +4又2/3=?
2.75-[(-1/2)-(-5/6)+(-3/8)] +4又2/3
=4分之11-[(-1/2)+5/6 - 3/8)] +3分之14
=11/4-(-1/24)+14/3
=66/24+1/24+112/24
=179/24