2道简便计算题 拜托大家了
(-3.25)+3.75-1/4+2.5+3又3/4+(-4又1/2)(-2又3/5)+(+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1...
(-3.25)+3.75-1/4+2.5+3又3/4+(-4又1/2)
(-2又3/5)+(+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3) 展开
(-2又3/5)+(+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3) 展开
3个回答
展开全部
(-3.25)+3.75-1/4+2.5+3又3/4+(-4又1/2)=(-3.25)+3.75-0.25+2.5+3.75-4.5=(-3.25)+3.5+2.5+3.75-4.5=(-3.25)+3.75+6-4.5=0.5+1.5=2(-2又3/5)+(+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3)
=(-2又3/5)+(-3又2/5)+(+3又1/4)+(+2又3/4)+(-1又1/2)+(-1又1/3)
=-6+6+(-1又1/2)+(-1又1/3)
=-1又3/6--1又2/6
=-2又5/6
=(-2又3/5)+(-3又2/5)+(+3又1/4)+(+2又3/4)+(-1又1/2)+(-1又1/3)
=-6+6+(-1又1/2)+(-1又1/3)
=-1又3/6--1又2/6
=-2又5/6
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