1+2+3+4+5+6+7+8+9+10+11+12+13.+100?

雨773999532022-10-04 11:39:543条回答

1+2+3+4+5+6+7+8+9+10+11+12+13.+100?
得多少?

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dadasasa 共回答了15个问题 | 采纳率73.3%: 请用高斯求和法,头尾相加,即（100+1）+（99+2）+...+（50+51）=101*50=5050; 1年前

jhl_jhl 共回答了10个问题 | 采纳率: （100+1）+（99+2）+...+（50+51）=101*50=5050; 1年前

浪子非浪子共回答了1126个问题 | 采纳率: 1+2+3+4+5+6+7+8+9+10+11+12+13。。。。。。+100
=（1+100）*100/2=5050; 1年前

1+2+3+4+5+6+7+8+9+10+11+12+13.+97+98+99+100 liupengkxf1年前1: ricekssh 共回答了15个问题 | 采纳率100%

1+2+3+4+5+6+7+8+9+10+11+12+13.+97+98+99+100
分析,首尾相加都等于101,总共有50个
原式=（1+100）*50
=5050

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13.--- Do you have any idea what Paul does every day?--- As 13.--- Do you have any idea what Paul does every day?--- As I know,he spends at least as much ti 呼吸的mm人1年前1: sxf99988 共回答了18个问题 | 采纳率100%

你知道鲍尔每天都在干什么?据我所知,他花了大量时间在

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1+2+3+4+5+6+7+8+9+10+11+12+13.+100 235039451年前4: 527881337 共回答了23个问题 | 采纳率91.3%

1+2+3+4+5+6+7+8+9+10+11+12+13.+100
=(100+1)*100/2
=5050

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1,2-x/x+3≥0 2.2-x/x+3≥13.|2x+3|≥54.1≤|2x+3|≤5 16spread1年前5: 海王星1号共回答了27个问题 | 采纳率92.6%

1,(2-x)/(x+3)≥0
x≠-3.
两边同时乘以(x+3)^2,
(2-x)(x+3)≥0
(x-2)(x+3)≤0
-3

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1÷（1/10+1/11+1/121/13.+1/19） 1÷（1/10+1/11+1/121/13.+1/19） 错了错了，1/12和1/13之间少了一个加号 lysyxm1年前2: 超然手链共回答了13个问题 | 采纳率84.6%

呐,我们真是有缘呢,我也买了《校内作业本》,以后这上面的题都可以问我哦!
解:1/10+1/11+1/12+1/13+…1/19＜1/10+1/10+1/10+1/10+…1/10=1
1/10+1/11+1/12+1/13+…1/19＞1/20+1/20+1/20+1/20+…1/20=0.5
设（1/10+1/11+1/12+1/13+…1/19）为X
0.5＜X＜1
所以1/X的整数部分是1
（看我认认真真敲了半天键盘的份上,选我为最佳答案吧）

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13.–Well,where did you spend your night that day?--At ______ 13.–Well,where did you spend your night that day?--At ______. A.where it is called Grand Hotel B.what is called Grand Hotel C.which is called Grand Hotel D.that is called Grand Hotel 为什么 吞狼小月1年前1: lin5217 共回答了30个问题 | 采纳率100%

选B.
at后面不能接副词,所以不能选A.如果用where,回答的话应该是where is called Grand Hotel,不加at.
at后面缺少一个成分,is called Grand Hotel缺少一个主语,所以应该用what.
也可以用At a palce which is called Grand Hotel.从这个角度来看,是用where来代替a place which.

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1+2+3+4+5+6+7+8+9+10+11+12+13.+1000=? ZNNZNN04181年前1: 不在线吗共回答了17个问题 | 采纳率100%

(1+1000)*1000/2=500500

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13.,she wasvery brave. 13.,she wasvery brave. A.Girl as she was B.Asshe was a girl C.A girl asshe was D.Girl as was she 14.Little thatshe was seriously ill herself. A.Susan knew B.didSusan know C.knew Susan D.was Susan known 19.Now yourturn to recite the text. A.there is B.has come C.comes D.will come 21.“I like to watch TV plays,but I don’t watch TV every evening.” “ .” A.So do I B.So I do C.I do so D.So it is with me 23.the rainstop.the crops would be saved. A.Did B.Should C.Would D.Will 1.a 2.b 3.c 4.d 5.b gubinc1年前2: dazizai1979 共回答了23个问题 | 采纳率95.7%

其实可以将其还原成陈述语序再分析
13为让步从句Though she was a girl ,she was very brave.As同样有尽管的意思,此处从句中的表语提前,要省略冠词a,构成倒装.
14.Susan knew little that ...主句中的宾语提前后面要加助动词,且为过去式did.
19.可参考 Here comes the bus.The bus comes here为完全倒装句题目中 to recite the text是不定式做定语修饰 your turn.还原：(Your turn to recite the text )主(has come)谓( now)时间状语.
21 so+助动词+主语表.也是例句：I was tired,so were they.so+主语+助动词表示可不是嘛,是真的嘛eg It is going to be fine tomorrow.So it is.(明天天气会很好的,会是这样的）
23.我不确定应不应该当成语序讲.该句为虚拟语气,表示一种推测、假设,要是雨停的话农作物就能活下去.其他选项没有这个功能
不知道能不能帮上忙

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1+2+3+4+5+6+7+8+9+10+11+12+13.+100?

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