(11x9+11)X(111x999+111)x(7x11x13-1001)
=(11x9+11)X(111x999+111)x0
=0
(11x9+11)X(111x999+111)x(7x11x13-1001)(...用简便方法计算
(11x9+11)X(111x999+111)x(7x11x13-1001)(...用简便方法计算
数学人气:886 ℃时间:2020-03-12 20:12:44
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