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6.18*9.9 0.618用简便的方法怎么计算
人气:229 ℃ 时间:2020-03-29 10:22:02
解答
6.18*9.9+ 0.618
=6.18*9.9+6.18*0.1
=6.18*(9.9+1)
=6.18*10
=61.8
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