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(11/19*0.317*18/19-0.317)除以3.17-(0.875-3/4+1/8-0.25)
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(11/19*0.317*18/19-0.317)除以3.17-(0.875-3/4+1/8-0.25)
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答案和解析
(11\19*0.317+0.317*18\19-0.317)\3.17-(0.875-3\4+1\8-0.25)
={0.317[11\19+18\19-1]}/3.17-[7/8-6/8+1\8-2/8]
=10/19-0
=10/19
={0.317[11\19+18\19-1]}/3.17-[7/8-6/8+1\8-2/8]
=10/19-0
=10/19
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