总述:本次共解1题。其中
☆算术计算1题
〖1/1算式〗
作业:求算式 (625+59)*(1+0.1)^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3 的值.
题型:数学计算
解:
(625+59)*(1+0.1)^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3
=684*(1+0.1)^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3
=684*1.1^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3
=684*1.1^-1+30*1.1^-2+(625+30)*(1+0.1)^-3
=684*1.1^-1+30*1.1^-2+655*(1+0.1)^-3
=684*1.1^-1+30*1.1^-2+655*1.1^-3
=684*0.909090909090909+30*1.1^(-2)+655*1.1^(-3)
=684*0.909090909090909+30*0.826446280991735+655*1.1^(-3)
=684*0.909090909090909+30*0.826446280991735+655*0.751314800901578
=621.818182+30*0.826446280991735+655*0.751314800901578
=621.818182+24.793388+655*0.751314800901578
=621.818182+24.793388+492.111195
=646.61157+492.111195
=1138.722765 答案:(625+59)*(1+0.1)^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3=1138.722765你的问题在这里没有得到解决?请到 热门难题 里面看看吧!