简便运算:(51×11×19)÷(57×77×17)
问题描述:
简便运算:(51×11×19)÷(57×77×17)
答
(51×11×19)÷(57×77×17)
=(51÷17)x(11÷77)x(19÷57)
=3x1/7x1/3
=1/7
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