5*6*7*8*9分之5*6*7*8*9-1*2*3*4*5等于几?_数学解答

5*6*7*8*9分之5*6*7*8*9-1*2*3*4*5等于几?

人气：499 ℃　时间：2019-11-12 01:57:23

解答

(5x6x7x8x9-1x2x3x4x5)/(5x6x7x8x9)
=1-1x2x3x4x5/5x6x7x8x9
=1-4/7x8x9
=1-1/126
=125/126