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(7/95÷20/19+0.25)×1.125如何简便算
人气:147 ℃ 时间:2020-05-12 17:24:50
解答
(7/95÷20/19+0.25)×1.125
=(7/95÷20/19+1/4)×9/8
=(7/95×19/20+1/4)×9/8
=(7/5×1/20+1/4)×9/8
=(7/100+25/100)×9/8
=32/100×9/8
=8/25×9/8
=9/25
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