【14.8+(3又2/7-105)*1又3/25】÷4又1/5 好的++++++
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[14.8+(3又2/7-105)×1又3/25]÷4又1/5
=[74/5+(23/7-105)×28/25]÷21/5
=(74/5+23/7×28/25-105×28/25)×5/21
=(74/5+92/25-588/5)×5/21
=74/5×5/21+92/25×5/21-588/5×5/21
=74/21+92/105-28
=370/105+92/105-2940/105
=(370+92-2940)/105
=-2478/105
=-118/5
=[74/5+(23/7-105)×28/25]÷21/5
=(74/5+23/7×28/25-105×28/25)×5/21
=(74/5+92/25-588/5)×5/21
=74/5×5/21+92/25×5/21-588/5×5/21
=74/21+92/105-28
=370/105+92/105-2940/105
=(370+92-2940)/105
=-2478/105
=-118/5
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