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2.005×390+20.05×41+200.5×2=______.
人气:279 ℃ 时间:2019-12-09 13:42:49
解答
2.005×390+20.05×41+200.5×2
=20.05×39+20.05×41+20.05×20
=20.05×(39+41+20)
=20.05×100
=2005.
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