(-1994)*(1995/1996)*{62/7+(-62/7)}*(-1996/1999)

问题描述:

(-1994)*(1995/1996)*{62/7+(-62/7)}*(-1996/1999)

62/7+(-62/7)=0
(-1994)*(1995/1996)*{62/7+(-62/7)}*(-1996/1999)=0主要过程、、那个大括号里面{62/7+(-62/7)}=0,然后零乘以任何数都得零 所以 (-1994)*(1995/1996)*{62/7+(-62/7)}*(-1996/1999) =(-1994)*(1995/1996)*0*(-1996/1999) =0