简便运算:20.11×47-201.1×1.9+2011×0.72
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/31 05:44:06
简便运算:20.11×47-201.1×1.9+2011×0.72
![简便运算:20.11×47-201.1×1.9+2011×0.72](/uploads/image/z/3003578-26-8.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%9A20.11%C3%9747-201.1%C3%971.9%2B2011%C3%970.72)
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
=2011x0.47-2011X0.19+2011X0.72
=2011x(0.47-0.19+0.72)
=2011x1
=2011