8.4*0.98+0.2*0.84的简便算法是什么?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 18:07:38
![8.4*0.98+0.2*0.84的简便算法是什么?](/uploads/image/z/241417-1-7.jpg?t=8.4%2A0.98%2B0.2%2A0.84%E7%9A%84%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95%E6%98%AF%E4%BB%80%E4%B9%88%3F)
8.4*0.98+0.2*0.84的简便算法是什么?
8.4*0.98+0.2*0.84的简便算法是什么?
8.4*0.98+0.2*0.84的简便算法是什么?
8.4*0.98+0.2*0.84
=8.4X0.98+0.02X8.4
=8.4X(0.98+0.02)
=8.4
=8.4×0.98+0.02×8.4=8.4*(0.98+0.02)=8.4
8.4*0.98+0.2*0.84=8.4*(1-0.02)+0.2*0.84=8.4-8.4*0.02+0.2*0.84=8.4