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145×929292/292929-460×458/459
=145×(92×10101)/(29×10101)-(459+1)×458/459
=145×92/29-459×458/459-458/459
=5×92-458-458/459
=460-458-458/459
=2-458/459
=1又1/459
=145×(92×10101)/(29×10101)-(459+1)×458/459
=145×92/29-459×458/459-458/459
=5×92-458-458/459
=460-458-458/459
=2-458/459
=1又1/459
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答:原式=145*(92*10101)/(29*10101)-460*458/459
=460-460*458/459
=460*(1-458/459)
=460*1/459
=1又1/459
=460-460*458/459
=460*(1-458/459)
=460*1/459
=1又1/459
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145×929292/292929-460×458/459
=145x(92x10101)/(29x10101)-460x(1-1/459)
=145x92/29 -5x92+460/459
=460-460+460/459
=460/459
=145x(92x10101)/(29x10101)-460x(1-1/459)
=145x92/29 -5x92+460/459
=460-460+460/459
=460/459
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