999×777+333×666
人气:320 ℃ 时间:2020-03-27 11:35:43
解答
999×777+333×666
=999×777+333×3x222
=999x777+999x222
=999x(777+222)
=999x999
=999x(1000-1)
=999000-999
=998001
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