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 -15×(1.29×273/(273+25)-1.30×273/(273+240))+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273 的值.
    题型：数学计算
    解:
          -15×(1.29×273/(273+25)-1.30×273/(273+240))+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273
        =-15×(1.29×273/298-1.30×273/(273+240))+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273
        =-15×(1.29×273/298-1.30×273/513)+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273
        =-15×0.489966+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273
        =-15×0.489966+0.03×6^2/2×1.3×513/273×15/0.75+6^2/2×1.30×(273+200)/273
        =-15×0.489966+0.03×6^2/2×1.3×513/273×15/0.75+6^2/2×1.30×473/273
        =-15×0.489966+0.03×36/2×1.3×513/273×15/0.75+6^2/2×1.3×473/273
        =-15×0.489966+0.03×36/2×1.3×513/273×15/0.75+36/2×1.3×473/273
        =-7.34949+0.03×36/2×1.3×513/273×15/0.75+36/2×1.3×473/273
        =-7.34949+1.08/2×1.3×513/273×15/0.75+36/2×1.3×473/273
        =-7.34949+0.54×1.3×513/273×15/0.75+36/2×1.3×473/273
        =-7.34949+0.702×513/273×15/0.75+36/2×1.3×473/273
        =-7.34949+360.126/273×15/0.75+36/2×1.3×473/273
        =-7.34949+1.319143×15/0.75+36/2×1.3×473/273
        =-7.34949+19.787145/0.75+36/2×1.3×473/273
        =-7.34949+26.38286+36/2×1.3×473/273
        =-7.34949+26.38286+18×1.3×473/273
        =-7.34949+26.38286+23.4×473/273
        =-7.34949+26.38286+11068.2/273
        =-7.34949+26.38286+40.542857
        =19.03337+40.542857
        =59.576227
    答案:-15×(1.29×273/(273+25)-1.30×273/(273+240))+0.03×6^2/2×1.3×(273+240)/273×15/0.75+6^2/2×1.30×(273+200)/273=59.576227

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