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数学 中学生

解き方教えてください🙏

B -3けたの自然数を 和を,a,b,c H 図2 G (1) (5) 次は、先生とAさんの会話です。 これを読んで、 下の①,②に答えなさい。 生 「次の図のように. 1辺の長さが1cmの正三角形を. すき間も重なりもなく並べて, 1 辺の長さが2cm 3cm 4cm 5cm........ の大きい正三角形をつくり 1辺の長 さが短い順に1番目 2番目 3番目 4番目.·...... とします。 それぞれの図形には、 1辺の長さが2cmの正三角形が何個あるかを考えてみましょう。 1番目 2番目 3番目 4番目 先 ア Aさん 「1辺の長さが2cmの正三角形といっても、 右の図1と 図2の正三角形があると思います。」 先生「よいところに気がつきましたね。 では、図1と図2の正 三角形を別々に考えてみましょう。 図1の正三角形は, それぞれの図形に何個あるでしょうか。」 Aさん 「1番目の図形には1個、2番目の図形には右の図3の ように、1番目の図形の1個の正三角形と,これに一 部重なる2個の正三角形が下側にあるので,これらを たして3個, 3番目の図形にはさらに下側に3個の正 三角形があるので、これもたして6個あります。」 図3 先生「正解です。同じように考えると、5番目の図形には、図1の正三角形が何個ありますか。」 Aさん「5番目の図形には、図1の正三角形がア個あります。」 先生「正解です。次に、図2の正三角形が、それぞれの図形に何個あるかも考えてみましょう。 1番目の図形と2番目の図形にはありませんが、3番目の図形には1個ありますね。4番 目の図形には3個あります。 それでは、5番目の図形には何個あるかわかりますか。」 Aさん「図1の正三角形のときと同じように考えるとよいのですね。そうすると、5番目の図形 n= 図1 には、図2の正三角形がイ個あります。」 先生「そのとおりです。 整理すると, n番目の図形 (ただし,n≧3)には、図1の正三角形 が { 1 + 2 + 3 + … 3 + +(n-2)+(n-1)+n}個,図2の正三角形が{1+2+ .…+(n-2)}個ありますね。 ところで, n番目の図形で、1辺の長さが2cmの正 三角形の個数を数えたときに,図1の正三角形の個数のほうが図2の正三角形の個数よ り 47個多くありました。 このときのnの値を求めてみましょう。」 Aさん 「n番目の図形で、図1の正三角形の個数から、図2の正三角形の個数をひいた差を, n を使って表すと, ( ウ) 個となります。 これを用いて方程式をつくって解くと です。」 先生「よくできました。」 イにあてはまる数をそれぞれ求めなさい。 (4点) まる数を求めなさい。 ( 5点) 図2 + -4- ウ □にあてはまる式を, nを使った最も簡単な形で書きなさい。また, I にあては All rights reserved 57

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英語 中学生

⑦に入る2語を答える問題です! 答えがfour hoursなのですが、なぜそうなるのですか?私はeight hoursだと思いました!!

10 15 20 5 6 次の英文は Olango という森の中にあるいくつかの村に住む動物たちの対話です。 これを読んで、あとの問いに えなさい。 Ay 40 was ' Kabbu is head of the Post Office of Olango, a forest. Many kinds of animals live there. Kabbu and his tea carry letters all over Olango and to other forests. Kabbu's Post Office is very popular among all animals there. Ullu: Why are you so sad? Kabbu: *Probably we'll have to lose my job. Have you heard of the Internet? Ullu: Have humans planned to catch us with a new kind of net? Kabbu: No, no. I hear the Internet is new *technology. All the computers can talk to each other through the Internet. We can talk with everyone around the world by a computer. Leo has the newes computer. He is always using it. He has also made many friends through the Internet and talk with them for hours. Ullu started to think about the Internet after he listened to Kabbu's long report about it. Ullu: Tell me, Kabbu, why will you have to lose your job because of the Internet? Kabbu: Leo is now sending e-mails all over Olango and to other forests. He says everyone in this village will be able to use his computer and send e-mails from his computer. Now, if everyone starts sending e-mails, ① 私たちはどうすればよいのかわかりません。 45 Ullu: Wait, wait. Now what is 'e-mail'? I haven't heard of it. Kabbu: It means *electronic mail'. It is used to send every kind of letter from one computer to other computers through the Internet. It takes only *a second and it is almost free. Ullu: I can't believe it. Kabbu: It is true. So I am very sad and worried about it now. With a sad face, Kabbu flew away. Kabbu was the oldest animal in Olango and was respected a lot by Leo Ullu decided to go and meet Leo and talk with him. At Leo's house, Leo was sitting in front of his computer. Ullu: Leo, can you give me a few minutes? I have to talk about something important. Leo: What is it? Ullu: It is about Kabbu, but I think it may be about all of us. Leo: OK, tell me about it. Ullu: But Leo, I think 50 55 1 60 Ullu told Leo about Kabbu. Leo: Well, Kabbu's *concerns will be real. We usually think high speed and *efficiency are very important, so there is little *chance for old ways. I can send a message in a second through the Internet. But Kabbu and his team need a few days to carry one. Why should I *depend on them? And the *price of their mail is much higher than the price of e-mail. Ullu: But, Leo, what will happen to Kabbu and his team? Leo: They will have to 3 The Internet will become more important in the future and e-mail will be one of the most useful things. 4 trains in the future." But now, "No one will go to see a movie." But both... Leo: You may have a lot of things to say about it, Ullu, but soon e-mail will make Kabbu's mail *useless. Kabbu and his team should start looking for other jobs *after all! For example, when a plane was invented, people said, "No one will see trains still continue to run. When a TV was invented, everyone said.

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英語 中学生

赤線のところなのですが、回答に訳は書いていたのですがどこで意味?が切れていてどれが接続詞に値するのかなどが分かりません💦どういう風に訳せば分かりやすいのか教えて欲しいです🙇‍♂️

芯のですが I would say that it was about fifteen years ago, a little girl, perhaps ten years old, was sitting in a wheelchair outside the hospital of Maputo, the capital of 1 Mozambique. To my surprise, the girl had no legs. I had a few words with her. She spoke in a very low voice, and 私は彼女に話しかけた it was difficult to catch what she was saying. But I understood that her name was Lilia. Today, many years later, Lilia is one of my closest and dearest friends. No one has taught me as much as she has about the conditions of being human. Also, no one has taught me more であること about poor people's *unprecedented power of resistance, (2 the people who have to live at the lowest of society in a world we all *share and inhabit; so *unjust, brutal and unnecessary. hardest things about The last word is very important. The unnecessary. One of the ③3③ today is that most of the *suffering is unnecessary. As I am writing this sentence, another child dies ( A ) *malaria, and that is unnecessary. At the same time, millions of children will not be able to read this. For them these words will be just strange signs because they simply do not have the *knowledge to understand them. For a writer like me, that is perhaps the biggest *disgrace of today, in the year 2008 millions and millions of children have to live a life in a world which they are *denied the *fundamental human right to learn how to read 4 and writo in

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