(11x9+11)X(111x999+111)x(7x11x13-1001)(...用简便方法计算
问题描述:
(11x9+11)X(111x999+111)x(7x11x13-1001)(...用简便方法计算
答
(11x9+11)X(111x999+111)x(7x11x13-1001)
=(11x9+11)X(111x999+111)x0
=0