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

问题描述:

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.

=99×1/2× 2/3×…… ×98/99 (前后约分)

=99× 1/99

=1