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1.(1)称两次就能把吃过那筐松果找出来。
(2)能。
(3)有可能一次称出来。因为如果天平两端各放4筐,这时天平恰好平衡,则剩下那筐就是小松鼠吃过的,这样只称一次就找出了小松鼠吃过的那筐松果;如果不平衡,就需要2次或3次才能称出来,故该方法是最优的。
2.
把15盒平均分成3粉,至少称3次就可以保证找出较轻的那盒饼干。
3.
7+4/5=43/35 5/12+5/8=25/24 7/9+7/6=103/63 1-2/7-3/7=2/7
1/4+1/6+3/4=7/6 1/2-1/6=1/3
4.
分析:爸爸和小明年龄差是不变的,现在和3年后两者的年龄差一样。
解答:设小明今年X岁,则爸爸今年为(X+24)岁。
X+24+x=34
X=5
所以小明今年5岁,爸爸为5+24=29(岁)
(2)能。
(3)有可能一次称出来。因为如果天平两端各放4筐,这时天平恰好平衡,则剩下那筐就是小松鼠吃过的,这样只称一次就找出了小松鼠吃过的那筐松果;如果不平衡,就需要2次或3次才能称出来,故该方法是最优的。
2.
把15盒平均分成3粉,至少称3次就可以保证找出较轻的那盒饼干。
3.
7+4/5=43/35 5/12+5/8=25/24 7/9+7/6=103/63 1-2/7-3/7=2/7
1/4+1/6+3/4=7/6 1/2-1/6=1/3
4.
分析:爸爸和小明年龄差是不变的,现在和3年后两者的年龄差一样。
解答:设小明今年X岁,则爸爸今年为(X+24)岁。
X+24+x=34
X=5
所以小明今年5岁,爸爸为5+24=29(岁)
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This is a story about a different generation of mother and daughter, between father and son, and loved ones, the story of how to communicate with each other.
Divorced mother of the husband still came in hook bound, and because of considerate handsome boy police appear, formed a triangle love; Leading role Laura situation with the mother similar, first with her boyfriend, heel boyfriend's rampage good friend make ambiguity... .
Haphazardly, mother accident turned up the daughter diary, found innocent little daughter, lie
Her emotional problems, but will also be fluff smoking, drinking, etc., the mother can't help flew into a rage and she thought: "now of how the child???????" .
The modern teenagers have a lot of problems? They day on the Internet with parents, don't understand the language to chat, have a meal of the time, not listening to MP3, is to use mobile phones to send text messages, make a pile of bad friends, drinking, smoking... Everything is not indispensable. Their parents don't understand their ideas are completely. In their own young, not as they so unusual, talk about a love, even a small hand be embarrassed to meet with; Go out for a movie, but also with their parents in advance report for... .
Director with a well-known figure for the characters play daughter spindle, young children and parents
Divorced mother of the husband still came in hook bound, and because of considerate handsome boy police appear, formed a triangle love; Leading role Laura situation with the mother similar, first with her boyfriend, heel boyfriend's rampage good friend make ambiguity... .
Haphazardly, mother accident turned up the daughter diary, found innocent little daughter, lie
Her emotional problems, but will also be fluff smoking, drinking, etc., the mother can't help flew into a rage and she thought: "now of how the child???????" .
The modern teenagers have a lot of problems? They day on the Internet with parents, don't understand the language to chat, have a meal of the time, not listening to MP3, is to use mobile phones to send text messages, make a pile of bad friends, drinking, smoking... Everything is not indispensable. Their parents don't understand their ideas are completely. In their own young, not as they so unusual, talk about a love, even a small hand be embarrassed to meet with; Go out for a movie, but also with their parents in advance report for... .
Director with a well-known figure for the characters play daughter spindle, young children and parents
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1.(1)至少两次就能把吃过那筐松果找出来。
(2)能。
(3)有可能一次称出来。因为如果天平两端各放4筐,这时天平恰好平衡,则剩下那筐就是小松鼠吃过的,这样只称一次就找出了小松鼠吃过的那筐松果;如果不平衡,就需要2次或3次才能称出来,故该方法是最优的。
2.
把15盒平均分成3粉,至少称2次就可以保证找出较轻的那盒饼干。
3.
7+4/5=7又4/5 5/12+5/8=25/24 7/9+7/6=35/18 1-2/7-3/7=2/7
1/4+1/6+3/4=7/6 1/2-1/6=1/3
4.
分析:爸爸和小明年龄差是不变的,
解答:设小明今年X岁,则爸爸今年为(X+24)岁。
X+24+x=34
X=5
所以小明今年5岁,爸爸为5+24=29(岁)
(2)能。
(3)有可能一次称出来。因为如果天平两端各放4筐,这时天平恰好平衡,则剩下那筐就是小松鼠吃过的,这样只称一次就找出了小松鼠吃过的那筐松果;如果不平衡,就需要2次或3次才能称出来,故该方法是最优的。
2.
把15盒平均分成3粉,至少称2次就可以保证找出较轻的那盒饼干。
3.
7+4/5=7又4/5 5/12+5/8=25/24 7/9+7/6=35/18 1-2/7-3/7=2/7
1/4+1/6+3/4=7/6 1/2-1/6=1/3
4.
分析:爸爸和小明年龄差是不变的,
解答:设小明今年X岁,则爸爸今年为(X+24)岁。
X+24+x=34
X=5
所以小明今年5岁,爸爸为5+24=29(岁)
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