50/(5/6)/(6/7)/(7/8)/(8/9) /是除号 急
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![50/(5/6)/(6/7)/(7/8)/(8/9) /是除号 急](/uploads/image/z/1633759-7-9.jpg?t=50%2F%285%2F6%29%2F%286%2F7%29%2F%287%2F8%29%2F%288%2F9%29+%EF%BC%8F%E6%98%AF%E9%99%A4%E5%8F%B7+%E6%80%A5)
50/(5/6)/(6/7)/(7/8)/(8/9) /是除号 急
50/(5/6)/(6/7)/(7/8)/(8/9) /是除号 急
50/(5/6)/(6/7)/(7/8)/(8/9) /是除号 急
50/(5/6)/(6/7)/(7/8)/(8/9)
=50×6/5×7/6×8/7×9/8
=50×(6/5×7/6×8/7×9/8)
=50×9/5
=90
先算分母(5/6)/(6/7)/(7/8)/(8/9)=5/9(约分)
再算50除5/9=50×9/5=90