某數(shù)的小數(shù)點(diǎn)向右移動(dòng)一位后,比原來(lái)數(shù)大27.原數(shù)是
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我是這樣想的:某數(shù)的小數(shù)點(diǎn)向右移動(dòng)一位后,相當(dāng)于此數(shù)擴(kuò)大了10倍,原數(shù)是1份數(shù),現(xiàn)在的數(shù)就是10份數(shù),現(xiàn)在的數(shù)比原數(shù)大9份數(shù),大了27,所以用27÷9即得原數(shù).
某數(shù)的小數(shù)點(diǎn)向右移動(dòng)一位后,相當(dāng)于此數(shù)擴(kuò)大了10倍,原數(shù)是1份數(shù),現(xiàn)在的數(shù)就是10份數(shù),現(xiàn)在的數(shù)比原數(shù)大9份數(shù),大了27,所以用27÷9即得原數(shù).
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