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简便计算333.3×6.666
人气:135 ℃ 时间:2020-05-20 15:50:19
解答
333.3×6.666………………… 变一变,就简便
=(333.3×3)×2.222
=999.9×2.222
=(1000-0.1)×2.222
=1000×2.222-0.1×2.222
=2222-0.2222
=2221.7778
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