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 (18.69×(1.78/3+15.1)+2077.84×(15.1/3×(2×35.68+239.53)/(35.68+239.53))-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63 的值.
    题型：数学计算
    解:
          (18.69×(1.78/3+15.1)+2077.84×(15.1/3×(2×35.68+239.53)/(35.68+239.53))-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63
        =(18.69×15.693333+2077.84×(15.1/3×(2×35.68+239.53)/(35.68+239.53))-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63
        =(18.69×15.693333+2077.84×(15.1/3×310.89/(35.68+239.53))-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63
        =(18.69×15.693333+2077.84×(15.1/3×310.89/275.21)-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63
        =(18.69×15.693333+2077.84×5.685887-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63
        =(18.69×15.693333+2077.84×5.685887-503.1×(3.9/3×400.99/(115.01+142.99)))/2599.63
        =(18.69×15.693333+2077.84×5.685887-503.1×(3.9/3×400.99/258))/2599.63
        =(18.69×15.693333+2077.84×5.685887-503.1×2.020492)/2599.63
        =11091.162313/2599.63
        =4.266439
    答案:(18.69×(1.78/3+15.1)+2077.84×(15.1/3×(2×35.68+239.53)/(35.68+239.53))-503.1×(3.9/3×(115.01+2×142.99)/(115.01+142.99)))/2599.63=4.266439

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