(-2.75)+(4又4分之1)+-(2又8分之3)

(-2.75)+(4又4分之1)+-(2又8分之3)
(-2.75)+(4又4分之1)+-(2又8分之3)

(-2.75)+(4又4分之1)+-(2又8分之3)
=-2.75+4.25-14/3
=1,5-14/3
=3/2-14/3
=9/6-28/6
=-19/6
希望能帮你忙,懂了请采纳,

-11/4+17/4-19/8=6/4-19/8=12/8-19/8=-7/8