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Copyright (C) 2017 Baidu2年后小红的年龄是爸爸年龄的．（2）三个质数的和是80，要使这三个质数的乘积最大，它们分别是2、37、41．（3）一列数：、、、、…那么在这列数中的第33个数．（4）一个等腰三角形底和高的比是8：3，把它沿底边上的高剪开拼成一个长方形，这个长方形的面积是192平方厘米．这个长方形的周长是56厘米．
科目：小学数学
题型：解答题
填空题．（1）小红今年12岁，爸爸40岁．______年后小红的年龄是爸爸年龄的．（2）三个质数的和是80，要使这三个质数的乘积最大，它们分别是______、______、______．（3）一列数：、、、、…那么在这列数中的第______个数．（4）一个等腰三角形底和高的比是8：3，把它沿底边上的高剪开拼成一个长方形，这个长方形的面积是192平方厘米．这个长方形的周长是______厘米．
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Copyright (C) 2017 Baidu三个质数的和是九十这三个数的乘积最大可以是多少？_百度知道
三个质数的和是九十这三个数的乘积最大可以是多少？
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90=2+41+472×41×47=3854
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两个质数的和是40，求这两个质数的乘积的最大值是多少？
&两个质数的和是40，求这两个质数的乘积的最大值是多少？
提问时间： 14:38:54提问者：
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40=3+37=11+29=17+2311&29=319 17&23=391 这两个质数乘积最大是391
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回答时间： 15:49:28
&40=3+37=11+29=17+2311&29=31917&23=391这两个质数乘积最大是391
回答时间： 15:01:34
回答时间： 08:55:28
回答时间： 00:08:47
&两个和是40的质数有：37+3；11+29；17+23
两数和一定时，两数的差越小它们的乘积越大
所以两个质数的和是40，这两个质数的乘积的最大值是17*23=391
回答时间： 20:37:53
回答时间： 16:04:21
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