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           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation (625+59)*(1+0.1)^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3 .
    Question type: Mathematical calculation
    Solution:
          (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

    Answer:(625+59)*(1+0.1)^-1+30*(1+0.1)^-2+(625+30)*(1+0.1)^-3=1138.722765


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