2.07÷0.023×0点四五用简便算法怎么算?

如题所述

第1个回答  2023-01-06
2.07÷0.023×0.45
=2070÷23×0.45
=(2300-230)÷23×0.45
=(2300÷23-230÷23)×0.45
=(100-10)×0.45
=100×0.45-10×0.45
=45-4.5
=40.5本回答被网友采纳