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+1090)^-1+30*(1+1090)^-2+(625+30)*(1+1090)^-3 的值.
题型:数学计算
解:
(625+59)*(1+1090)^-1+30*(1+1090)^-2+(625+30)*(1+1090)^-3
=684*(1+1090)^-1+30*(1+1090)^-2+(625+30)*(1+1090)^-3
=684*1091^-1+30*(1+1090)^-2+(625+30)*(1+1090)^-3
=684*1091^-1+30*1091^-2+(625+30)*(1+1090)^-3
=684*1091^-1+30*1091^-2+655*(1+1090)^-3
=684*1091^-1+30*1091^-2+655*1091^-3
=684*0.000916590284143+30*1091^(-2)+655*1091^(-3)
=684*0.000916590284143+30*0.000000840137749+655*1091^(-3)
=684*0.000916590284143+30*0.000000840137749+655*0.000000000770062
=0.626948+30*0.000000840137749+655*0.000000000770062
=0.626948+0.000025+655*0.000000000770062
=0.626948+0.000025+0.000001
=0.626973+0.000001
=0.626974 答案:(625+59)*(1+1090)^-1+30*(1+1090)^-2+(625+30)*(1+1090)^-3=0.626974你的问题在这里没有得到解决?请到 热门难题 里面看看吧!