(+1又2分之1)-(+5)+(-3分之1)-(+4分之1)+(-5又3分之2)
2个回答
展开全部
(+1又2分之1)-(+5)+(-3分之1)-(+4分之1)+(-5又3分之2)
=1+1/2 -5 -1/3 - 1/4 - 5 - 2/3
=(1-5-5)+(1/2-1/3-1/4-2/3)
= -9 +(6-4-3-8)/12
= 负9又3/4
=1+1/2 -5 -1/3 - 1/4 - 5 - 2/3
=(1-5-5)+(1/2-1/3-1/4-2/3)
= -9 +(6-4-3-8)/12
= 负9又3/4
追问
使分母相同或便于通分的加数结合在一起
追答
(+1又2分之1)-(+5)+(-3分之1)-(+4分之1)+(-5又3分之2)
=(1-5-5)+(1/2-1/4-1/3-2/3)
= -9 + ( 2/4-1/4-4/4)
= -9 -3/4
= 负9又4分之3
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