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1c:Te5a,センター数学は、1a2bどちらも、試験範囲が幅広く、問題数がかなり多いと思います。また、センター数学というのは、二次で出されるような問題とは少し形式が違っていて、苦手意識がある方が多いかもしれません。

なので、
・時間が足りなかったり、焦って計算ミスが多い。
・苦手分野の大問の点数がほとんど取れない。
・センター数学特有の形式に慣れていない。

…など、色んな原因が考えられます。

きらら さんが、どれに当てはまるかは分かりませんが、センター数学を解くのに大事だと思うことを簡単にまとめていきたいと思います！

・時間が足りない
これは正直に言うと、慣れていくしかありません。
過去問や予想問題集を何回もやってみたり、実際に時間を計ってみてどのくらいのペースで解いたらいいのかをやってみたり。と、とにかく量をこなすことをオススメします。

そんなに時間が無い…っていう方は大問ごとに時間を計ってやるのもいいと思います。

目安の時間としては、
大問1,2：18分 
大問3,4,5(選択)：12分
ぐらいでしょうか。
マークずれなどの見直しが必要なので、もう少し削った方がいいのですが、最初はこの時間を目指していくといいと思います！

・苦手分野の点数が取れない
センター数学は基本的に、教科書の例題から多く出題されています。なので、苦手だと思う分野があれば、もう一度教科書を読んでみるのがいいと思います。

また、出題内容もパターン化されているので、それを覚えてしまう。というのもアリだと思います。基本的は公式を当てはめていくことがほとんどなので、公式をしっかり覚えて、使えるようにしましょう！

・センター特有の形式
二次数学では、大問一つに問題が一つや二つというのが多いですが、センター数学は、大問ごとにたくさんの小問が並んでいます。なので、問題をひとつずつ間違えないように解いていくのが大事になってきます。
また、図形問題や数列問題などでは、前に解いた小問の値を使って解く問題も多く出てくるので、しっかり整理しておくことも大事です！

また、センター数学は選択問題もあるのですが、点数を取ろうと思うと、大問三つを解いて自信のある二つを選ぶというのが一番いいと思います。
…が、そんな時間はないという方が多いと思いますし、2bの統計は学校では勉強しない方がほとんどだと思います。なので、先程出した時間配分よりも少し長めにとって、確実に解くという方法もあります。とにかく、小問一つずつをきっちり解くのが大事です！


長々と書いてきましたが、センター数学は例年平均点が低く、皆さんが苦労している教科だと思います。ただ、逆を言うと、ここで差をつけれる教科でもありますし、差が生まれてしまう教科でもあります。

暗記科目よりは、あまり時間をかけれないとは思いますが、少しずつでも対策しておいた方がいいと思います。点数をあげるのに時間がかかると思いますが、コツコツとやっていくと必ず点数はあがります！

参考になればと思います。1d:Tf3c,はじめまして。
私なりのセンター対策を紹介します。以下3点です。
①計算ミスをしない。一番わかりやすくて一番対策しにくいことだと思います。一番良くないのが｢本番気をつければいいや｣です。これは確実に本番間違えるパターンです。模試や演習というプレッシャーがほとんどない状態でミスをするのに本番というとてつもないプレッシャーがかかる状態でミスしない訳ありません。具体的な対策を考えるべきです。私の場合は、途中式をきっちり書くという方法をとりました。一見非効率のように思えて実は効率的です。途中式を書くことでどこで間違えたかがひと目で分かるので、ミスをしてもすぐに修正できます。脳内でやったり殴り書きで計算するとどこで間違えた分からず、最初からやり直す羽目になりとても時間を溶かします。また紙に書くことで思考が整理されます。おすすめです。
②誘導に乗る。すごく当たり前のことですが、センターで店が取れない人は意外と出来ていないです。ただ一つ一つ空白を埋められれば良いのではなくて、全体を通して何をしているのかを理解できないといけません。センターに限定するとパターンはそんなに多くありません。図形は多い印象ですが、使う考え方は限られていてそれをどう組み合わせるかです。こういうものは過去問を通して身につけるのが一番です。引き出しを増やすという意味でやれるだけやるのがいいと思います。ただそれで他の科目が出来なくなるのは本末転倒ですが。問題を解いてみてこれ見たことあるなと思える状況がベスト。解答を読んでも何をしているのかわからない場合は、参考書に立ち返ってみるべきです。
③公式を使う。公式とは本来、一々求めていては面倒だから結果として覚えておくものです。その面倒の意味としては時間がかかるというところがあります。基本的に公式の丸暗記は数学で使う論理的思考力を停止させ腐らせるので、嫌っている人も多い(私もその立場です)が、センターで使うのは論理的思考力と言うよりも情報処理能力です。経過よりも結果が求められる場ですので、公式は使えるだけ使って時短すべきです。教科書に乗っているのはもちろんですが、センター対策本とか見ていると、3次関数の面積や数列の和などの教科書ではあまり見かけない公式が結構乗っています。積極的に使って、少しでも時間を節約しましょう。

あと質問にあった解き直しや時間配分について触れておきます。
・解き直しについて。なんでミスをしたのか、原因は何かを明らかにすることが目的です。正直頭ではわかっている(やっていることも理解出来ていてなぜミスをしたのかも理解している)なら無理にとき直す必要も無いと思います。むしろ知っている問題をしっかり記憶することよりも、知らない問題を溶けるようになることの方が大切なので。あまり周りがやっているからといって鵜呑みにするのは良くないです。
・時間配分は人によって異なります。模試などを使って、自分にあった時間配分を考えましょう。ちなみに私は全部15分でした。15分たったら途中でも次の問題に行き目を通す。次の問題が軽そうだったら戻る難しそうだったら解けるところまで解いて戻る。2:["$","main",null,{"className":"px-4 pt-4 pb-4","children":["$","div",null,{"className":"max-w-3xl mx-auto w-full","children":[["$","div",null,{"className":"mb-8","children":["$","$L7",null,{"href":"https://unilink-app.onelink.me/isbO/h6xeh63x?advice=QlwwLGUBp00JfyF5dz_G","target":"_blank","children":["$","$L8",null,{"src":"/images/web_to_app_banner.jpg","width":3660,"height":1500,"sizes":"100vw","style":{"width":"100%","height":"auto"},"alt":"UniLink WebToAppバナー画像","className":"mb-4 rounded"}]}]}],["$","h1",null,{"className":"text-xl font-semibold mb-2","children":"センター数学の時間不足"}],["$","div",null,{"className":"flex justify-between mb-4","children":[["$","div",null,{"className":"text-left text-xs text-caption","children":["クリップ(",36,") コメント(",2,")"]}],["$","div",null,{"className":"text-right text-xs text-caption","children":"8/12 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mb-4","children":[["$","div","advice-part-0",{"children":[null,"分かります。それは昨年僕も直面しました。だから僕の克服方法を書いてみたいと思います。\nまずはあなたの仰っている通り、大問一つ一つにかける時間を制限してやりましょう。その時間を過ぎたら次の問題に行く感じです。目安としては、僕は去年は数ⅠAは、1.10分、2.15分、4.10分、5.10分で残りの15分で解けそうなところをやるのと見直し、数II･Bは、1.15分、2.15分、3.10分、4.10分で、残りの10分で解けそうなところをやるのと見直し。恐らく数II･Bの方は残り時間を大問2に費やすと思います。\nまた、解く順番を変えてみるという手もあると思います。計算する脳、図形を読み解く脳は別なので、似通ったところを一気に解いてしまいたいです。僕は、昨年、数ⅠAは1→4→5→2、数II･Bは1→3→4→2でやりました。時間がかかる分布と微積は最後に解くのが得策です！\nあとは、過去問だけでなく様々なところが出版している、センター試験の演習問題的なのをひたすら地道に、時間を意識して解いてみてください。センター試験は同じような問題が出題されるので、12月頃にはパッと見て「あーこの解き方ね」というふうに解けるようになります。センター間近になったら時間内に終わるようになりますよー！それぞれの問題集について2周以上することが重要です！ちなみに他の教科でも2周以上する点については同じです。\nあと、これは自論ですが二次試験対策を11月までにやっといた方がいいですよー！\n質問などがあれば気軽にしてください！\n頑張ってください💪"]}]]}],["$","div",null,{"className":"mb-4","children":["$","$L16",null,{"adviserImageUrl":null,"adviserName":"n.o.53","adviserDepartment":"九州大学工学部","adviceId":"QlwwLGUBp00JfyF5dz_G","numberOfFan":3,"clipsAvg":12.2,"adviceRateAvg":4,"profile":"プロフィールを編集してください。"}]}],["$","div",null,{"children":["$","$L7",null,{"href":"https://ck.jp.ap.valuecommerce.com/servlet/referral?sid=3364577&pid=884970531&vc_url=http%3A%2F%2Fshingakunet.com%2F%3Fvos%3Dnrmnvccp0000100","rel":"nofollow","target":"_blank","children":["$","$L8",null,{"src":"/images/document_request_banner.jpg","width":3660,"height":1500,"sizes":"100vw","style":{"width":"100%","height":"auto"},"alt":"UniLink 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mb-1","children":"センター1A,2Bともに9割は超えていたので回答させていただきます。\n\nKazukiさんがおっしゃるように、記述でそれだけの点数が取れているのであれば、数学は得意であると思います。\n\nしたがって、センター数学の問題は、時間をかければほぼ満点取ることができるのではないでしょうか。\n\nセンター数学は、短い時間で正確に、より多くの問題を解かなければなりません。\n\nKazukiさんのように記述ではとれるが、センターでなかなか点数が伸びない方の特徴としては、\n1)時間配分がうまくできていない\n2)うまく誘導に乗れていない\nというのが挙げられるかと思います。\n\n1)先述の通り、センター数学では問題の難易度はあまり高くないものの、時間が限られています。\nそのため、適切な時間配分が必要です。\n問題を解く際に、記述模試のようにじっくり解きすぎていたり、1問に時間をかけすぎていたりしてはいないでしょうか。\n大問1番の最後の難しい問題の2点と、大問5番の最初の簡単な問題の2点は、同じ2点です。\n予め大問ごとの時間配分を(5分あまりくらいで)決めておき、その時間になったらぜったい次の大問に進む！と決めておいた方が、合計でいい点数が取れることが多いです。\n最後まで解き終わったあとで、戻ってやり残した問題を解けばいいのです。\n\n2)記述とセンターの違いとして、センターはより誘導が細かくされている、という点が挙げられます。\nそのため、どう解いたらいいのかわからない場合、自分で考えるよりも、誘導を利用した方が速く解ける場合が多いです。\n過去問演習を通して、誘導を利用するコツを身につけるといいと思います。\n\np.s.)\nここでは、センター数学の問題を時間をかければ解けるという前提でお話しましたが、時間をかけても解けない場合。\nセンター数学の問題はバリエーションが多くないため、演習を多く重ねることで解けるようになります。\nもちろん、解答解説をしっかり読んで復習することは必須です。\n\n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":[["$","div",null,{"className":"mb-1","children":"センター数学 残り一ヶ月で点数を上げる方法"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"センターは、毎年同じような問題が出ているため、過去問を10~20年分を2周か3周くらいひたすらして、飽きてきたら、書店に並んでいる、センター形式の似たようなやつをひたすらやると良いと思います！解いた後は解答して、分からなかったところを解説を見て理解するようにしてください。解説だけでは分からなかったところは、教科書見るなり、分かる人に聞くなりして理解できるように努めましょう！ただ、分からなかったところを全部理解しようと思ったら時間がかかりすぎると思うので、ここまでできたら目標点に達するというところの少し先くらいまでを理解するようにしてください。なぜ少し先くらいまでかというと、どれか1個の大問がとても難しくても、数学全体的には目標点に達するようにするためです！\n\nとは言ったものの、あと一ヶ月くらいしかないので、過去問をもしやってないのなら、10年分×2周は最低でもやっておかなければならないと思います！過去問をやっているようであれば、センター形式の問題集を時間を測りながら、ひたすらやってみてはどうでしょうか。\n\n初見の問題で焦るとおっしゃっていますが、センター試験に関しては、過去問や、センター形式の問題集をやっていたら、初見の問題はあまり出ないと思います。もし出るとしても、少しだけだと思うので、最悪解かなくても、50点は取れると思います。だから、初見の問題が苦手なのであれば、初見の問題を減らすためにひたすら演習することが大切なのではないかと思います。\n\nなんだかんだ言って、大学入試は、最終的には気持ちだと思っています。「絶対受かるんだ！」という気持ちで気合い入れて頑張ってください！！！\n\n（僕と同じクラスの人で、僕が少し数学を教えていた人はセンター試験当日、間違えて、ⅠAを解かなければならないのに、Ⅰを途中まで解いてしまった人がいるので気を付けてください！）\n\n質問などあったら気軽にしてください。"}],["$","div",null,{"className":"flex mb-1","children":[["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 24 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