1.-87.21+53又19/21-12.79+43又2/212.-8.25-(-10)-(-0.25)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 23:34:06
![1.-87.21+53又19/21-12.79+43又2/212.-8.25-(-10)-(-0.25)](/uploads/image/z/695287-55-7.jpg?t=1.-87.21%2B53%E5%8F%8819%2F21-12.79%2B43%E5%8F%882%2F212.-8.25-%EF%BC%88-10%EF%BC%89-%EF%BC%88-0.25%EF%BC%89)
1.-87.21+53又19/21-12.79+43又2/212.-8.25-(-10)-(-0.25)
1.-87.21+53又19/21-12.79+43又2/21
2.
-8.25-(-10)-(-0.25)
1.-87.21+53又19/21-12.79+43又2/212.-8.25-(-10)-(-0.25)
1.-87.21+53又19/21-12.79+43又2/21
=-(87.21+12.79)+(53又19/21+43又2/21)
=-100+97
=-3
2.
-8.25-(-10)-(-0.25)
=-8.25+10+0.25
=2
1, -87.21+53又19/21-12.79+43又2/21
=(53又19/21+43又2/21)-(12.79+87.21)
=97-100
=-3
2,-8.25-(-10)-(-0.25)
=-8.25+0.25+10
=-8+10
=2
1.-87.21+53又19/21-12.79+43又2/21
=(53又19/21+43又2/21)-(87.21+12.79)
=97-100
=-3
2.-8.25-(-10)-(-0.25)
=-8.25+10+0.25
=(-8.25+0.25)+10
2.
-8.25-(-10)-(-0.25)
=-8.25+10+0.25
=2