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2005*97.75+4010*1.125用简便方法计算写过程
人气:129 ℃ 时间:2020-05-12 05:34:46
解答
2005x97.75+4010x1.125
= 2005x97.75+2005x2x1.125
=2005x97.75+2005x2.25
=2005x(97.75+2.25)
=2005x100
=200500
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