初一计算题(过程具体)

问题描述:

初一计算题(过程具体)
|-0.2|-|-3-(+8)|-|-8-2+10|=
(-16)+(-5又3/8)+24+(-8/5)+10=
81.26-293.8+8.74+111
|1/2001|-21/2000+|1/2000-1999|-|1/1999-1/2001
1/2+1/4+1/8+……+1/256+1/512+1/1024
1+2+3……+1997+1998+1999=
|1/2001|-21/2000+|1/2000-1999|-|1/1999-1/2001

|1/2001|-21/2000+|1/2000-1/1999|-|1/1999-1/2001|

|-0.2|-|-3-(+8)|-|-8-2+10|=-(-0.2)-|-3-8|-|-10+10|=0.2-|-11|-0=0.2-11=10.8
(-16)+(-5又3/8)+24+(-8/5)+10=-16+(-43/8)+24-8/5+10=18+(-8/5)-(43/8)=18+(-64/40)+(-215/40)=18-279/40=441/40 81.26-293.8+8.74+111=(81.26+8.74)-293.8+111=90-293.8+111=201-293.8=-91.2
|1/2001|-21/2000+|1/2000-1/1999|-|1/1999-1/2001|=1/2001-21/2000-(1/2000-1/1999)-(1/1999-1/2001)=1/2001-21/2000=1/(1+2000)-21/2000=(1-1/2000)*1999-21/2000=1999-1999/2000-21/2000=1999-101/100=1997.99