【5又1/3+(8.7-3又1/2×2又1/7)】/19又3/5

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【5又1/3+(8.7-3又1/2×2又1/7)】/19又3/5

{5+1/3+[8.7-(3+1/2)*(2+1/7)]}/(19+3/5)
={5+1/3+[8.7-7/2*15/7]}/(19+3/5)
={5+1/3+[8.7-15/2]}/(19+3/5)
={5+1/3+[8.7-7.5]}/(19+3/5)
={5+1/3+1.2}/(19+3/5)
={5+1/3+1+1/5}/(19+3/5)
={6+1/3+1/5}/(19+3/5)
={6+5/15+3/15}/(19+3/5)
={6+8/15}/(19+3/5)
={98/15}/(98/5)
=98/15*5/98
=5/15
=1/3

1/3

【5又1/3+(8.7-3又1/2×2又1/7)】/19又3/5
=【16/3+(8.7-7/2*15/7)】*(5/98)
=【16/3+(8.7-7.5)】*(5/98)
=【16/3-1.2】*(5/98)
=(16/3+6/5)*(5/98)
=(98/15)*(5/98)
=1/3