计算（-2/3)-(+1/2)-(-5/6)-(+1/3）-（+1又1/2)

（-2/3)-(+1/2)-(-5/6)-(+1/3）-（+1又1/2)
=[（-2/3)-(+1/3)]-[(+1/2)-(1又1/2)]-(-5/6)
=-1-1+5/6
=2又5/6

（-2/3)-(+1/2)-(-5/6)-(+1/3）-（+1又1/2)
=-2/3-1/2+5/6-1/3-（+1又1/2)

=(-2/3-1/3)+5/6+(-1/2-1又1/2)
=-1+5/6-2
=-3+5/6
=-(2又6/6-5/6)
=-2又1/6

解：=（-4/6)-(+3/6)-(-5/6)-(+1又3/6)
=(-4/6)-(3/6)+(5/6)-(9/6)
=(-11/6)
晕，问问大人不就行了

解：原式=（-2/3)-(+1/2)-(-5/6)-(+1/3）-（+1又1/2)
=[（-2/3)-(+1/3)]-[(+1/2)-(1又1/2)]-(-5/6)
=-1-1+5/6
=2又5/6