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1b: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:Tc7c,勉強お疲れ様です！共通テストの点数の取り方を紹介するのでぜひ参考にしてみてください！
まずは、なにが原因で点数が取れていないのかを確認するべきです。共通テストで点数が取れない理由としては、①単純な数学力不足、②時間が足りない、の二つのどちらかでしょう。記述模試で8割取れているもち。さんであれば、②のほうかなと思います。もし、確認してみたければ、共通テストを時間を気にせず解いてみてください。もしそれで、8割以上とれるのであれば、共通テストレベルの数学力はあると思ってもらって構いません。もし足りていないようでしたら、苦手な分野の演習を参考書を用いて行う必要があります。

次に、時間が足りない場合ですが、もち。さんは自分の中で時間配分は決まっていますか？私が軽く意識していた時間配分を乗せておきます。

数学ⅠA
大問1 20分
大問2 20分
大問3 15分
大問4 15分
・意識すること
大問1,2で40分を決まりごとにする。それをこえたら、もう次の大問に行く。

数学ⅡB
大問1 10分
大問2 10分
大問3 15分
大問4 10~15分
大問5 10~15分
大問6 10~15分
・意識すること
大問3までで、35分にする。それをこえたら、次の大問に行く。

まず、共通テストの点数を上げるためには、共通テスト形式の問題を解きまくるしかないです。ただ、そこに再現性を求め、時間配分や解くスピードなどを実践に近づけて行う必要があります。そのため、たくさん共通テストを解いて、たくさんミスしてください。そして、そのミスから学んでください。計算ミスなのか、理解が浅かったのか、問題文を理解していなかったなど。一つ、共通テストを解くうえで、意識したい「誘導」のポイントを挙げておきます。

最も重要なのは、解いているひとつ前の問題を意識するということです。軽いことで誰でもやっているように思われますが、答え合わせをしてみて、「ここさっき出してわかってたやん」となる箇所が少なからずあると思います（私は多々ありました、、、）。問題に詰まってしまったときには、一つ前の問題に注目してみてください。なにかヒントが隠れているはずです。

数学ⅠAを安定させるために必要なこととしては、データの分析を完璧にしておくことです。必ず出題される分野であり、ここを落としたがために成績が伸びない、低く見えるのはよくあることです。そのため、データの分析であまり点数を落とさないようにしましょう。

最後に、あまり点数に一喜一憂せずにひたすらに勉強してみてください。悪い点数を取っても、深呼吸して、「次がんばろ」と思って復習してください。受験勉強頑張ってください！1e:T15b3,こんにちは！
　今の時期は共通テスト演習などで点数が伸び悩んだり下がったりしてしまう時期ですよね。私自身もそうでしたので、きらしさんだけの成績が伸び悩んでいるわけではありません！これは本当に本当なので変に焦ったりする必要はないですよ、大丈夫です🔥
　その上で私の考えを答えさせて頂きます。

基礎ができているのかどうか

　私は共通テストレベルの演習で9割近い点数を取れたことがあるならば教科書レベルの基礎はある程度固まっていると思います。仮に4割とかを取ってしまっても解答解説を読んだときに理解できて自分の中で消化することはできているでしょうか？できているのであれば基礎は大丈夫です！少し不安に思った公式や定理があったらその部分を教科書で読み返した方がいいですが、基本的には教科書に立ち返って学習する必要はないと思います。

点数を上げるためにできること
　
　得点が伸び悩んでいる自己分析をしてくださったのですが、本当に共通テストの成績が伸び悩む受験生の課題を的確に分析できています。それぞれ3つの課題点を改善すれば得点は伸びて安定します。
　まず計算ミスは気をつけるしかないです。自分がミスをしやすいということを念頭に問題を解き進めるだけでもだいぶ違いますし、共通テストに関してはマークシートなので解答の形がある程度わかりますよね。それが常に一致しているのか確認しながら解くと私はいくらかましになりました。
　次に計算の速度ですが、これは慣れが大切です。日頃からめんどくさい計算を電卓などを使わずに解いたりすることなどが大切です。分数などの計算もかなり苦戦すると思います。私も計算力が低かったのでよくわかります。分数の計算は因数分解が得意かどうかがかなり影響すると思うので『wallprime』というアプリを使って隙間時間に楽しみながらやるといいと思います。また、実は共通テストの場合は問題冊子の余白をいかに効率よく使うかが重要です。計算スペースがなくなって1番前の表紙の裏とかまでめくって計算することってありませんか？？ミスの原因にもなりますしけっこう時間を食ってしまいます。何度も演習を重ねる中で効率の良い余白を使い方をマスターできると非常に良いと思います！
　次に手前の誘導の問題が解けずに最後まで解けないことがあるのは共通テストあるあるだと思います。これは日頃の問題への取り組み方で対応できることもあると思っていて、普段の問題演習から解法を何パターンか考える癖をつけることをおすすめします。共通テストの場合たまに意味のわからない(と感じてしまう)誘導が含まれてます。これはどうしようもないかなと思いますが、それで大問まるまる落とすのは非常にもったいないです。誘導にとらわれずに解法の引き出しが複数あると最終的な答えを求めることはできるようになると思いますし、そこから逆算して誘導の部分の解答がわかるときもあります。あまり解く順番にとらわれずにわかるところからどんどん値を出していく意識を持てるようになると点数は安定するはずです！
　解き方がそもそもわからない場合は解説をすぐに読んでしまっていいと思います。さすがに今の時期にじっくり考えるのは少しタイムパフォーマンスが悪いのでとにかく解説を読んですぐに消化し、暗記してしまう方が早いでしょう。仮にもし時間に少し余裕がある場合は青チャートのコンパス3レベルまでの記述解答をつくる練習ができたらよいですが、優先順位は低いです。記述の練習をするのは誘導に頼らずに問題を解くことで解法の引き出しを増やすことができるからです。それこそ共通テストで誘導につまづいたときに最終的な答えを出す力がつきます。

　私は共通テストの直前期(元旦)に数学が解き終わらないことが増えました。そこで1日で共通テスト数学ⅠAⅡBをまとめて100分で5回分解くといく荒療治でスピード感を高めました。この先もし時間をかければ8〜9割取れるけど時間内に解き終わらないという状況になったときはこのような解き方もなしではないと思います。１日でだいぶ問題を解く速度が上がる実感があるはずです。
　まずは年内に少し時間オーバーしてもいいから8割を安定して取るために丁寧に解く→次にスピード感を高めるというイメージでラスト1ヶ月のスパートをかけるといいと思います！

　長くわかりづらい文章になって申し訳ありません。また何か疑問点や相談がございましたらコメント欄やDMでご相談ください！なるべく早く返信いたします。ラストスパート頑張りましょう！🔥🔥2:["$","main",null,{"className":"px-4 pt-4 pb-4","children":["$","div",null,{"className":"max-w-3xl mx-auto w-full","children":[["$","div",null,{"className":"mb-8","children":["$","$L7",null,{"href":"https://unilink-app.onelink.me/isbO/h6xeh63x?advice=zA7Sk2oBTqPwDZPu97hD","target":"_blank","children":["$","$L8",null,{"src":"/images/web_to_app_banner.jpg","width":3660,"height":1500,"sizes":"100vw","style":{"width":"100%","height":"auto"},"alt":"UniLink WebToAppバナー画像","className":"mb-4 rounded"}]}]}],["$","h1",null,{"className":"text-xl font-semibold mb-2","children":"センター数学8割超えたいので助けて欲しいです。"}],["$","div",null,{"className":"flex justify-between mb-4","children":[["$","div",null,{"className":"text-left text-xs text-caption","children":["クリップ(",47,") コメント(",2,")"]}],["$","div",null,{"className":"text-right text-xs text-caption","children":"5/8 4:43"}]]}],["$","div",null,{"className":"coach-mark 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計算量を多くしてしまってる事に関しては裏技等で演算量を減らしすこと、ミスしやすいところの理解に関しては特に序盤のミスが後々効いてくるので序盤を特に丁寧にしてみてください。"}],["$","div",null,{"className":"flex mb-1","children":[["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 24 24","className":"text-subPrimary mr-1","children":["$undefined",[["$","path","0",{"fill":"none","d":"M0 0h24v24H0V0z","children":[]}],["$","path","1",{"d":"M12 6c1.1 0 2 .9 2 2s-.9 2-2 2-2-.9-2-2 .9-2 2-2m0 10c2.7 0 5.8 1.29 6 2H6c.23-.72 3.31-2 6-2m0-12C9.79 4 8 5.79 8 8s1.79 4 4 4 4-1.79 4-4-1.79-4-4-4zm0 10c-2.67 0-8 1.34-8 4v2h16v-2c0-2.66-5.33-4-8-4z","children":[]}]]],"style":{"color":"$undefined"},"height":16,"width":16,"xmlns":"http://www.w3.org/2000/svg"}],["$","div",null,{"className":"text-xs","children":["北海道大学理学部"," ","No.55"]}]]}],["$","div",null,{"className":"flex justify-between","children":[["$","div",null,{"className":"flex","children":[["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"センター数学が出来なすぎる"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"自分もセンター数学苦手でした。\n確かに独特な問題あるし、自分が何をやってるかを見失うと一気に解けなくなりますよね。\n国立が第1志望でしたが、ちゃんと対策し始めたのは11月くらいからです。最初は6割の時とかあってめっちゃ焦りましたが、単純に時間配分や分かるところから解くなどのことを徹底して、問題に慣れることで9割安定させました。\n今の時期にセンター数学で悩む必要はあまりないと思います。それより、私大の数学対策をしっかりして地力を上げた方がいいですよ。そうすれば、センターでも解ける幅が広がるはずです。\n\nまあ、\n➊解けるとこから解く\n➋計算ミスに絶対的に注意\n➌詰まったら問題全体を見渡し、何をやってるかを確認する\n➍ ➌をやっても分からないなら潔く飛ばす\n\nこの辺を意識してみてください。"}],["$","div",null,{"className":"flex mb-1","children":[["$","svg",null,{"stroke":"currentColor","fill":"currentColor","strokeWidth":"0","viewBox":"0 0 24 24","className":"text-subPrimary mr-1","children":["$undefined",[["$","path","0",{"fill":"none","d":"M0 0h24v24H0V0z","children":[]}],["$","path","1",{"d":"M12 6c1.1 0 2 .9 2 2s-.9 2-2 2-2-.9-2-2 .9-2 2-2m0 10c2.7 0 5.8 1.29 6 2H6c.23-.72 3.31-2 6-2m0-12C9.79 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items-center py-4","children":[["$","div",null,{"className":"flex-1","children":[["$","div",null,{"className":"mb-1","children":"セ数８割で合格するための数学勉強方法"}],["$","div",null,{"className":"text-xs text-caption line-clamp-2 mb-1","children":"こんばんは。拙いですが、質問に答えさせていただきますね！\n①チャートをしっかりと解くといいと思います。もし、時間がないのであれば1A〜3までのチャートの例題を全て読むだけでも、忘れた解き方や重要な解き方が復習でき凄くいいです。センターだけでなく、2次試験対策にもなります。\n②模試の復習はするに越したことはありませんが、繰り返しやる必要があるかどうかは正直疑問です。というのも、模試はテストそのものの雰囲気を味わうことが一番大切な役目だと考えているからです。なので、分からなかったところをテスト後に復習することは大事ですが、授業の復習をメインにするといいと思います。特に塾では重要な点を説明されていると思うので、なおさら大事だと思います。チャートをずっと続けて分からなくなったら、授業の復習をしてみると効率的かつ効果的ではないでしょうか。\n③センター数学についてです。僕は本番数学は合計192でしたが、模試や練習の時は、6割出してしまう時もよくありました。センター数学の最大の特徴は、時間が足りずに焦ってやらかす、というところだと思います。12月にはセンター以外の勉強はするべきではないので、今は週一ぐらいでしっかりと時間を決め、友達と一緒にやるのもいいと思います、時間配分や難問の見極めなどをしっかり身に付けることが大事だと思います。\n最後にセンター数学高得点の秘訣は、\n「最初の問題ほど計算ミスに気をつけ丁寧に解く。分からない問題は、そこにはまらず、即座に次の問題に移れる勇気をつける」\nだと思います。\nあと数ヶ月間頑張ってください！"}],["$","div",null,{"className":"flex 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