简便运算:20.11×47-201.1×1.9+2011×0.72

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/31 16:26:03

简便运算:20.11×47-201.1×1.9+2011×0.72

20.11×47-201.1×1.9+2011×0.72
=2011x0.47-2011X0.19+2011X0.72
=2011x(0.47-0.19+0.72)
=2011x1
=2011

20.11×47-201.1×1.9+2011×0.72
=20.11×47-20.11×19+20.11×72
=20.11×(47-19+72)
=20.11×100
=2011

2011*0.47-2011*0.19+2011*0.27=2011(0.47-0.19+0.72)=2011*1=2011

20.11×47-201.1×1.9+2011×0.72
=2011×0.01×47-2011×0.1×1.9+2011×0.72
=2011×(0.47-0.19+0.72)
=2011×1
=2011