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 ((0.5%-0.1%)×0.000625-(0.8%-0.1%)×0.5×0.000625)/((0.5%-0.1%)×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625) 的值.
    题型：数学计算
    解:
          ((0.5%-0.1%)×0.000625-(0.8%-0.1%)×0.5×0.000625)/((0.5%-0.1%)×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)
        =(0.004×0.000625-(0.8%-0.1%)×0.5×0.000625)/((0.5%-0.1%)×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)
        =(0.004×0.000625-0.007×0.5×0.000625)/((0.5%-0.1%)×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)
        =0.000001/((0.5%-0.1%)×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)
        =0.000001/(0.004×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)
        =0.000001/(0.004×0.000625+0.007×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)
        =0.000001/(0.004×0.000625+0.007×0.0004-0.011×0.5×0.000625)
        =0.000001/0.000003
        =0.333333
    答案:((0.5%-0.1%)×0.000625-(0.8%-0.1%)×0.5×0.000625)/((0.5%-0.1%)×0.000625+(0.8%-0.1%)×0.0004-(0.5%+0.8%-2×0.1%)×0.5×0.000625)=0.333333

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