99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以······乘以(1-99分之1)怎么算
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99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以······乘以(1-99分之1)怎么算
急.
急.
![99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以······乘以(1-99分之1)怎么算](/uploads/image/z/2202748-52-8.jpg?t=99%E4%B9%98%E4%BB%A5%EF%BC%881-2%E5%88%86%E4%B9%8B1%EF%BC%89%E4%B9%98%E4%BB%A5%EF%BC%881-3%E5%88%86%E4%B9%8B1%EF%BC%89%E4%B9%98%E4%BB%A5%EF%BC%881-4%E5%88%86%E4%B9%8B1%EF%BC%89%E4%B9%98%E4%BB%A5%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%C2%B7%E4%B9%98%E4%BB%A5%EF%BC%881-99%E5%88%86%E4%B9%8B1%EF%BC%89%E6%80%8E%E4%B9%88%E7%AE%97)
=99 × 1/2 × 2/3×…… ×98/99 (前后约分)
=99× 1/99
=1
=99× 1/99
=1
99乘以(1-2分之1)乘以(1-3分之1)乘以(1-4分之1)乘以······乘以(1-99分之1)怎么算
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(1乘以2)分之1 加上(2乘以3)分之1加上(3乘以4)分之1加上(5乘以6)分之1··(49乘以50)?
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