(-3又1/2)-(-2又1/3)-(-1又1/2)-(-5又3/4)
=-7/2+7/3+3/2+23/4
=-2+2+1/3+5+3/4
=5+4/12+9/12
=6又1/12
(-1又1/3)+|(-5又1/2)-(-3又1/2)|
=-4/3+11/2-7/2
=-4/3+2=2/3
(-3又1/2)-(-2又1/3)-(-1又1/2)-(-5又3/4)
=-7/2+7/3+3/2+23/4
=-2+2+1/3+5+3/4
=5+4/12+9/12
=6又1/12
(-1又1/3)+|(-5又1/2)-(-3又1/2)|
=-4/3+11/2-7/2
=-4/3+2=2/3