( 1)找规律填数字:0,1,1,2,3,5()()

2024-10-27 15:18:01
推荐回答(5个)
回答1:

0,1,1,2,3,5,8,13
规律:前两个的和

(2)
3*2=2/3+3/2
2*3=3/2+2/3
所以(3*2)-(2*3)=0

(3)
设总数X
师傅每小时做x/15,徒弟每小时做x/25
5*(x/15+x/25)=400
x=750

(4)
乙骑车速度是每小时16公里
两人相距36公里有两种情况,一是还没相遇,距离36公里,二是相遇后又走了36公里
情况一时总共走了108-36=72公里
情况二时总共走了108+36=144公里
时间t=72/(20+16)=2小时,或者t=144/(20+16)=4小时
上午8时同时出发
所以两人相距36公里时,是早上10点,或者中午12点

(5)
设胜X场,平Y场,输Z场
那么
X+Y+Z=15(由于是单循环赛)
3X+Y=28
所以该队的比赛情况有以下可能:
胜9平1输5
胜8平4输3
胜7平7输1

回答2:

( 1)找规律填数字:0,1,1,2,3,5,(8),(13)
规律是每一项是前两项的和。

( 2)(3*2)-(2*3)=(3/2+2/3)-(2/3+3/2)=0

(3)师傅1小时完成1/15,徒弟1小时完成1/25,两人合作,一小时完成1/15+1/25=8/75,5小时可完成总数的8/75*5=8/15,所以总数为400/(8/15)=750个

(4)乙的速度为20-4=16公里/小时,所以两人需要(108-36)/(20+16)=2小时能相距36公里,此时为8+2=10时整
或(108+36)/(20+16)=4小时,此时为8+4=12时整

(5)该对共比赛15场,得分28分,设胜利X场,平局Y场,则失16-X-Y场。所以有:
3X+Y=28
因为X、Y只能是整数,且范围和X+Y应在0——15间,所以X、Y可取(7、7)、(8、4)、(9、1)三种情况。即:
一、胜利7场、平局7场、失利1场;
二、胜利8场、平局4场、失利3场;
三、胜利9场、平局1场、失利5场。

回答3:

1、0, 1, 1, 2, 3, 5, 8, 13
每一项是前两项的和。

2、3
我判断你题目打错了吧?应该是(3/2+2/3)-(2/3+3/2)=3 否则这个题目就没意义了

3、750
师傅1小时完成1/15,徒弟1小时完成1/25,两人合作,一小时完成1/15+1/25=8/75,5小时可完成总数的8/75*5=8/15,所以总数为400/(8/15)=750个

4、10或12点
乙的速度为20-4=16公里/小时,所以两人需要(108-36)/(20+16)=2小时能相距36公里,此时为8+2=10时整 然后是碰头后再相距 这里就不计算了

5、胜9平1 9*3+1*1
胜8平4 8*4+4*1
胜7平7 7*3+7*1

回答4:

1)8,13(0+1=1,1+1=2,1+2=3...)
2)0,只要按规律写出式子,不用算都知道.
3)设有n个零件,师傅速度:n/15,徒弟速度:n/25
(n/15+n/25)*5=400,n=750
4)10点和12点.有两种状况:两人还未相遇,108-(20+16)t=36,t=2h
两人已经相遇,变为背向而行,(20+16)t-108=36,t=4h
5)单循环,该队与另外15队各打一场,共15场:
胜 平 负
7 7 1
8 3 4
9 1 5 共3种状况

回答5:

1) 8 13 规律是每一项是前两项的和

2)(3*2)-(2*3)=(3/2+2/3)-(2/3+3/2)=0

3) 师傅1小时完成1/15,徒弟1小时完成1/25,两人合作,一小时完成1/15+1/25=8/75,5小时可完成总数的8/75*5=8/15,所以总数为400/(8/15)=750个

4)两人没有相遇:(108-36)/(20+16)=2小时
相遇以后各自继续,再距离36:(108+36)/(20+16)=4小时
故 10点或12点

5)胜9平1 9*3+1*1
胜8平4 8*4+4*1
胜7平7 7*3+7*1
其它不符

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