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1c:T102d,初めまして。rockyyyと申します。
数学の勉強法において、最も重要なことは解法を見ながら理解することであると思っています。一度間違えた問題の解法を完全に理解しないままにしておくと、同じ問題に何度向き合っても解けないままです。なので解けなかった問題に関しては、解説をよく読み、理解することを重要視すると良いと思います。

具体的にどのようなことをすればいいのかというと、僕は解説を最初から最後まで逐一理解しながら読み進めていくことが良いと思います。

例えば、
「ここで、次のように式変形する。」と言ったような文言が出てきた場合、「なんかわからんけど、そう式変形するのね」と考えるのではなく、「なんのためにその式変形をするのか。その式変形でなんの得があるのか」ということを考えるということです。そうすると、「この式変形をすることで、このような操作が可能になるのか！」とか「こう式変形することでこの法則が使えるようになるんだ!」などの発見があるのではないかと思います。それを繰り返して、その問題の解法を完全に理解すると、その問題に対してだけでなく、似たような問題にも同時に対応できるようになると思います。「ここで、この法則を使いたいから、前学んだみたいにこうすることで・・」と言ったような感じで対応できてくるのではないかと思います。僕はそうして学んだ知識をノートに書き留めておき、チラチラ日常的にみるようなことをしていました。

そうすると、実際に数学において、未知の問題(自分が解いたことのない問題)に対しても、その問題を解くための様々な手法を思いつくようになり、それを使って解くことができるようになりました。成績も伸びて、数学がより楽しく、そして勉強が楽しくなったことを覚えています。

なので、数学の問題を解くことにおいて大事なことは、最初は解けなくても良いので解法を読んで、「こうすることでこの解法が使えるのか」ということや「こうすることでこの公式が使えるのか」となることが重要です。それを自分の言葉でノートなどにまとめておくとさらに良いと思います。僕は問題を解いてわからなかったため空いた空白に色ペンで「このようにすることで、この公式を使って問題が解ける」と言ったようなことを書いていました。そして今でもその手法で数学を勉強しています。

そして、話が変わりますが数学において慣れというものも僕は大事であると思っています。ある程度の知識(基本問題を一通り解くなど)を得た場合は、問題集などでひたすら演習を積んで、解説を読んでわからなかった問題に対する解法を学んで自分の言葉でインプットするということを繰り返すと良いのではないかと思います。そうすることで、この「問題見たことある!]となって、自然に解法が浮かんでくるようになると思います。そうなっていくとどんどん問題が解けるようになってくるので、数学が楽しくなり、また勉強するという好循環を引き起こしてくれると思います。

そして、理系においては数学に比重が大きい入試がほとんどなので、入試において優位に立てるようになると思います。最初の方は、まだ知識も足りていないかもしれないので全然解けないかもしれませんが、辛抱強くこうした勉強法を続けていくと、自然に解けるようになってくると思います。良ければ参考にしてください！！受験応援しています！1d:Tf28,ある程度の数学の基礎は身についていると思うのでその先の勉強方法について話したいと思います。
数学の難しい問題というのは解き方の展望が見えてこないものが多くあります。なので、正確に文章を読んで、文章の中からヒントを拾ったり、式の形をみて、使えそうな公式や、定石となる解き方を考えてみることが必要になります。おそらくランボさんはこのようにして、いくつか選択肢に上がった解法の中に正解となる解法があったのにそれが使えなかった、ということだと思います。しかし解き方を思いついてから最終的な解答方針まで見えてくることはほとんどないと思います。難しい問題はイメージとしては壁が2〜3段階あるという感じです。最初の足がかりとなる解き方をして出てきた式が解けない。そして再び考える。それに対して解き方を考えまたやる。問題を解く時はこれの繰り返しになってきます。
難しめの問題のイメージを話したので、次は勉強方法について書いていきたいと思います。数学は多くの問題集に手を出すより、一冊完璧に、とよく言いますが、その通りだと思います。なぜなら、結局一冊の中に大方必要になってくる解法は全て入っているからです。そして例えばプラチカであればその単元ごとにまとめて学習していくことをお勧めします。その時に確率であれば、P型、C型、漸化式型、円や数珠順列、条件付き確率、じゃんけんや、勝敗を決めるパターン、etcがあると思うので、そのパターンを「漏れなく、だぶりなく」身に付けるとともに、どのパターンの問題はどうゆうような問題文になっているのかを自分なりに考察することが大切です。例えば、簡単な例ですが、組み合わせの時に同じようなものを区別するかしないかで解き方が変わると思います。このように問題文や式を観察して、どのときにどのパターンを使うことが多いか分類すると良いでしょう。このとき、「漏れ」がないことで、どれかのパターンに帰着し、「だぶり」がないことで、実は同じ解法なのに出題形式が違うから両方覚えてしまって、どっち使うか迷うような手間が省けます。そこを意識して勉強するのがいいと思います。
最後に過去問についてですが、過去問はあくまで出題形式、傾向や、時間などを確認して実践するものだと思っています。なので直近6年のものは残しておくべきでしょう。またマスターって言葉の定義は曖昧です。マスターが過去問の解き方を覚えるだけであるなら無駄だと思います。問題を見て、なんでこの解法をしたのか考え、そして始めてその問題を見たと仮定したとき、その問題文からどんなキーワードを拾ったら、自分がその解法にたどり着くかというところまで考え、身に付けることができて、始めてマスターしたと言えます。それなら過去問のマスターはかなり有用だと思います。数学は初見で考え、解いて、解答をみて、終わる人が多く、初見で考えることが重要だと思われがちですが、それを可能にするには解答をみた後の上記の考察がもっとも重要になると思います。
試験本番までまだあと4ヶ月あります。十分に身に付けるだけの時間はあると思うので最後まで頑張ってください。応援しています。2:["$","main",null,{"className":"px-4 pt-4 pb-4","children":["$","div",null,{"className":"max-w-3xl mx-auto w-full","children":[["$","div",null,{"className":"mb-8","children":["$","$L7",null,{"href":"https://unilink-app.onelink.me/isbO/h6xeh63x?advice=K9Ni92YBTqPwDZPu1Ndl","target":"_blank","children":["$","$L8",null,{"src":"/images/web_to_app_banner.jpg","width":3660,"height":1500,"sizes":"100vw","style":{"width":"100%","height":"auto"},"alt":"UniLink WebToAppバナー画像","className":"mb-4 rounded"}]}]}],["$","h1",null,{"className":"text-xl font-semibold mb-2","children":"数学の解き方"}],["$","div",null,{"className":"flex justify-between mb-4","children":[["$","div",null,{"className":"text-left text-xs text-caption","children":["クリップ(",2,") コメント(",1,")"]}],["$","div",null,{"className":"text-right text-xs text-caption","children":"11/9 16:32"}]]}],["$","div",null,{"className":"coach-mark 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mb-1","children":"解法を覚える勉強は全くお勧めしません。\n\n君のいう通り、解法を覚えれば公式を覚えれば問題は解けるかもしれませんが、それは教科書の例題や、参考書の優しいレベルの問題ですよね？\n\nましてや、目指すところが東大なら絶対にやめるべきです。公式っていうのは麻薬みたいなもんで、一回使うと解ける気になり何度も何度も使っているうちに結局現象や本質が何なのかわからなくなり、後戻りできなくなります。\n\n近年東大数学、理科などは易化傾向にあるとよく言われますし、事実僕が受けた年も数学なんてすごく簡単になっていたと思います。\n\nただそれは解法暗記などで解けるということではなく、数学の本質を理解した上で自然な考え方で解けると行った意味です。\n\n\nでは、どうすればいいのか？\n\n僕は進学校に通っており周りに僕より優秀な友達が沢山いるという恵まれた環境であったため質問すれば答えが返ってきていました。\n\n\nおそらく君はそういった仲間を得るのが難しい環境にいるんだろうと思います。\n\n\n１つできる解決策は予備校、塾などに通うことです。\n自分より優秀な仲間や、先生が疑問を解決してくれることでしょう。\n\nそれも難しいとなれば、アドバイスできることは、今までより一問一問を大切にしてください。\n問題が解けない→解答を見る→それでもわからない→放置...これではいけません。\nせめて\n問題が解けない→解答を見る→解答のどこまではわかったか、どこがわからないか吟味→明確化された疑問点について参考書を読む\nこのくらいはしてほしいです。\n\nもし、それでもわからない場合はそれは仕方ないです。でもその時も、例えば問題に目印をつけ、解答のわからない部分にマーカーを引くなどして疑問であったことを覚えておいてください。\n\n明日になれば、「何だこんなことか」とわかるかもしれませんし、時間が経って君が成長した時にようやくわかるかもしれません。\n\n疑問があることは財産です。それをできる限り活かせるように意識してみてください。\n\n頑張って！"}],["$","div",null,{"className":"flex 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mb-1","children":"こんにちは！\n\n早稲田の理系志望ということで、おそらく悩みは数学か理科だと思うので、どちらも対応できるよう回答させていただきます。\n\n・数学\n\n数学ですが、解答を見れば理解できるということで、基礎的な問題の解き方は抑えられているのだと思います。\n\n応用問題は基本的には基礎問題の組み合わせでできていますので、「今まで解いた問題の中でこの問題に似た問題はなかったか」「問題文のこの部分を数式に訳すとどうなるか」という多方向の視点からまずは問題を見るようにしましょう。それだけでも変わるはずです！\n\nそして、この視点からの考え方の見につけ方ですが、やはり問題演習の量が必要です。また、1つの問題に対してじっくり考え、多方向の視点から見ることができるような耐久力と思考力が必要になります。基本的な問題は覚えるのにそこまで時間はかからなかったかもしませんが、ここは時間をかけていきましょう。\n\n1度考えた問題については、あまりに変な問題でない限り考え方を覚えた方がいいです。応用問題にありがちな考え方などもありますし、似た問題が出る可能性もあるからです。\n\nまた、知っているかもしれませんが、僕自身はYouTubeの「PASSLABO」というチャンネルの数学の動画をよく見ていました。1つの問題だけではなく、ほかの問題に繋がる思考のポイント(特に整数など)を効率よく学べるので、疲れた時に見るのがかなりオススメです。\n\n・理科\n\n理科は数学とは違い、思考力のようなところを鍛える必要は数学ほどありません。それよりはとにかく問題演習量を積みましょう。\n\n理科は問題演習をすればするほど伸びる科目と言われます。それは、発展的な問題がそのまま問題文違いや数字違いで出ることが多いからです。これは、理科が数学ほど計算メインの科目ではなく、知識と計算が半々で重要であることに起因します。\n\nですので、もちろん過去問演習などの時には1問1問じっくり考えて、今までやった問題で似たものは無かったかなど考えるのは大事ですが、問題集で全く分からなかったものは潔く解答を見て理解することが大事です。同じような問題を別の問題集でまた解いてみる方が懸命でしょう。"}],["$","div",null,{"className":"flex 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mb-1","children":"こんにちは！東工大理学院のひろと申します！\n\n数学で、答えを見ても分からない問題がある時の対処法をお伝えしようと思います！\n\nまず、教科書に載っている基本事項が抜けていないか確認しましょう。大抵の問題は基本事項を抑えることが出来ていれば、解説を読めば理解出来るはずです！それでも分からないという場合は数学の先生に聞くなどして解決しましょう。その際も、ここまでは理解できたが、その先が分からないという聞き方をするとスムーズで仕事が早いでしょう。\n\nでは、教科書に載っている基本事項を抑えるとはどういうことなのかをお伝えします。まず、大切なのは公式を一通りマスターすることです。もちろん公式の丸暗記はよくありません。なぜその公式が導かれるのかを自分で説明できるようになって初めてその公式をマスターできたと言えるでしょう。実際に僕は公式は無理に暗記せず、なんとなくで覚えて全て導出できるようにしていました。あとは、問題を解いていく中で自然に使えるようになります。覚えようとして覚えるのではなく、使っていくうちに覚えるのが効率が良いと思います。また、公式をマスターした後に解く問題は教科書の例題程度で構いません。教科書の例題は舐められがちですが、重要な例題が沢山載っているのでしっかりマスターしましょう。その後は、教科書の章末問題、網羅系参考書といった順番で進めていくと良いでしょう。僕は網羅系参考書でFocusGoldを使っていました。この流れで進めていけば大抵の問題で解説を理解することは可能だと思います。(初見で解けなくても)\n大切なのは、丸暗記しないことです。数学は暗記科目ではありません。必ず思考のプロセスがあります。それをおろそかにするといつか難しい問題に当たった時に行き詰まります。そうならないように、日頃から思考のプロセスを意識して数学の勉強をしてください。思考のプロセスとは、何故そのような変形をするのか、何故その公式を使うのかなどのことです。これを説明できるようになると、数学の力がどんどん上がっていくでしょう。\n\n最後に、何故そうなるのかを意識しながら数学の勉強を進めてください。分からないことがあれば基本事項に立ち返って、周りの人に頼りながら頑張ってください！良い結果が出ることを心から祈ってます！！"}],["$","div",null,{"className":"flex 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"難しい問題"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"わからない問題に巡り合った時はチャンスです。その問題を理解していくことによって、自分の学力が増していきます。\n受験が近づいてくれば、時間の関係上、どうしてもわからない問題は捨てると言うようなことをしなければならないかもしれません。しかし、現在高校2年生なのであれば、時間をかけてでも理解して行った方が良いでしょう。\n\n難しい問題の解説を読んだ後は、解答を見ずに自分で1から答案を作ってみると良いと思います。\n自分で答案を作ることによって、全体の流れや、どのような意図で計算を進めて行っているのかなどがわかります。そうすることで、より解答の理解が進むのではないでしょうか。\n\n問題の解説が理解できないことがあっても、それは頭が悪いからではありません。\n必要な知識が足りていないことがほとんどだと思います。どうしてもわからなければ、その分野の復習をしたり、似たような問題を探してみると良いと思います。\n\nまた、どれだけ考えてもわからなかった問題が、人からヒントをもらったり、時間を空けてもう一度考えてみるとあっさり理解できてしまうこともあります。\n考えても考えてもわからない時は、人に聞いてみたり、時間を空けて考え直すこともしてみると良いと思います。\n\n先ほども言ったように、わからない問題は成長できるポイントなので、その場で理解できなくても、その問題の存在自体はしっかり記録しておきましょう。\n解けなかった問題を載せるノートを作ったりして、わからなかった問題をいつでも見返せるようにしておくと良いと思います。\n\nまた、このような難しい問題への対処は大学での勉強でも必要になってきます。\n私は京都大学理学部の所属ですが、考えてもわからない問題に直面することは多々あります。\n高校生の時から、このような問題の対処を学んでおくと、大学での学業にも必ず生きてきますので、頑張ってください。\n2年後に京都大学のキャンパスで会えるのを楽しみにしています。\n"}],["$","div",null,{"className":"flex 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"数学の思考力"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"結論から言うと、数学の問題の解法は自分で手を動かして探していくものです。大学入試の問題を解いていくなかで、問題をパッと見ただけで解法が思いつくということはあまりないです。\n\n例えば、図形の問題だったら図を描いてみたり補助線を引いてみたり、nなどの定数が出てくるような問題だったら試しにn=1などとおいてみたり、…といった感じで自分で手を動かしながらだと、「あ、ここから解けそうかも」と解法が見えやすくなります。\n\nさらに言うと、問題をたくさん解いていくうちに、「こういう問題のときはこうする」みたいな定石のようなものが身に付いてくると思います。\n\n例えば、2次関数の問題が出てきたらまず平方完成してみたりしますよね。それと同じで、図形問題が出たら、座標に置き換えるかベクトル(まだ習ってなかったらすみません)を使うか考える、とか、整数問題が出たら余りを考えることが多い、とか、勉強を進めていくにつれてある程度やることは決まってきます。\n\n大学入試の問題は、意外と普通の解き方で解けるような問題がほとんどです。「え、そんな解き方があるの？」みたいなひらめき100%の問題はめったにありません。それに奇抜な解法を要求するような問題はみんなも解けないので安心してください(笑)。\n\n問題集で詰まってしまったら、まず解答をみましょう。「意外と普通の解法だったな」と思ったら、もう一度何もみないで解き直してみる。「こんな解法初めてみた」という問題はまず一旦解答を写してみて、何をやっているのか理解する。と勉強するといいと思います！\n\nまだ習っていない範囲も残っていると思いますが、勉強頑張ってください！"}],["$","div",null,{"className":"flex 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"数学の勉強方法"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"たくさんの問題に触れていくうちにわかりますが、大学受験数学に限って言えば、全く見たこともないような解法を用いる問題は出題されません。そのため、より多くの問題を知っていけば知っていくほど、新しい問題に出会った時もどこかで似たような問題を経験していることになるので、問題を見た時点で大体の解法の道筋が思い浮かぶようになります。\n\nこの観点でいえば、問題を見た時点で全く解法の初手すら思い浮かばない状態ならば、解答をしっかり読んで自分のものにし、次回類題に出会ったときに手早く解けるようにした方が時間効率は良いと思います。\n\nもちろん、数学が好きな方だったりじっくり数学を楽しみたい方ならば、自分で最後まで解ききる方が気持ちいいですし、実際の試験場での解答作成に向けた練習にもなるのでそれはそれで良いと思います。現に僕も数学に比較的長い時間を費やしたりしていました。\n\nただ、受験勉強として入試に向けて万全の状態になることを最優先とするならば、早い段階から出来る限り多くの問題を経験し、全く手が動かず途方にくれるということがない状態にすることが理想ですから、解法のきっかけが掴めそうにない問題に長時間固執するよりは、ある程度の時間考えてわからなければ解答を見てやり方を身につける方をオススメします。"}],["$","div",null,{"className":"flex mb-1","children":[["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 24 24","className":"text-subPrimary 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