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 -26.31+57.29×1.27-1/2×12.93×(1.27)^2-1/2×20.41×1.45×(1.27-2/3×1.45)-1/2×12.93×(1.27-1.45)^2 的值.
    题型：数学计算
    解:
          -26.31+57.29×1.27-1/2×12.93×(1.27)^2-1/2×20.41×1.45×(1.27-2/3×1.45)-1/2×12.93×(1.27-1.45)^2
        =-26.31+57.29×1.27-1/2×12.93×1.27^2-1/2×20.41×1.45×(1.27-2/3×1.45)-1/2×12.93×(1.27-1.45)^2
        =-26.31+57.29×1.27-1/2×12.93×1.27^2-1/2×20.41×1.45×0.303333-1/2×12.93×(1.27-1.45)^2
        =-26.31+57.29×1.27-1/2×12.93×1.27^2-1/2×20.41×1.45×0.303333-1/2×12.93×(-0.18)^2
        =-26.31+57.29×1.27-1/2×12.93×1.6129-1/2×20.41×1.45×0.303333-1/2×12.93×(-0.18)^2
        =-26.31+57.29×1.27-1/2×12.93×1.6129-1/2×20.41×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-1/2×12.93×1.6129-1/2×20.41×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-0.5×12.93×1.6129-1/2×20.41×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-6.465×1.6129-1/2×20.41×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-10.427398-1/2×20.41×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-10.427398-0.5×20.41×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-10.427398-10.205×1.45×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-10.427398-14.79725×0.303333-1/2×12.93×0.0324
        =-26.31+72.7583-10.427398-4.488494-1/2×12.93×0.0324
        =-26.31+72.7583-10.427398-4.488494-0.5×12.93×0.0324
        =-26.31+72.7583-10.427398-4.488494-6.465×0.0324
        =-26.31+72.7583-10.427398-4.488494-0.209466
        =46.4483-10.427398-4.488494-0.209466
        =36.020902-4.488494-0.209466
        =31.532408-0.209466
        =31.322942
    答案:-26.31+57.29×1.27-1/2×12.93×(1.27)^2-1/2×20.41×1.45×(1.27-2/3×1.45)-1/2×12.93×(1.27-1.45)^2=31.322942

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