第三个路由器怎么设置:0.47×71+0.65×14.7-0.521×4.7怎么简算?

来源:百度文库 编辑:杭州交通信息网 时间:2024/05/11 01:51:50
越简单越好,别用计算器哦

0.47×71+0.65×1+0.65×0.47-5.21×0.47
=0.47×(71+0.65+5.21)+0.65×1
=0.47×76.86+0.65

原式=0.47×71+0.65×10+0.65×4.7-0.521×4.7
=0.47×71+6.5+6.5×0.47-5.21×0.47
=0.47×(71+6.5-5.21)+6.5
=0.47×72.29+6.5
=40.4763

4.7*7.1+0.65*10+0.65*4.7-0.521*4.7
=6.5+4.7*(7.1+0.65-0.521)
=6.5+4.7*7.229