超わかる！授業動画

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直角三角形の合同条件【中学数学】平面図形＃９

直角三角形の合同条件のポイントは！ ✅直角三角形とは１つの角が直角である三角形のこと ✅直角の向かいにある辺のことを斜辺という ✅直角三角形の合同条件は ❶斜辺と１つの鋭角がそれぞれ等しい ❷斜辺と他...

2021-04-10 18:00:17 有 14,039 人看過有 137 人說讚

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【異常】酸を薄めると塩基になる!?【高校化学】酸と塩基

極端に水で薄めた溶液のpHの考え方は！ ✅薄めすぎてほぼ水になっているから、pHはほぼ７でOK！ ✅このほぼ７と答えるときは、酸性だったものが計算すると塩基性になったり塩基性だったものが計算すると...

2021-04-08 18:00:13 有 7,914 人看過有 122 人說讚

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【証明】余弦定理【高校数学】公式の証明＃９

余弦定理を証明します。 ✅「余弦定理」の授業動画授業動画▶https://youtu.be/fviogWp6n_w 一橋大（過去問解説）▶https://youtu.be/s4uT-i8yCF4 ...

2021-04-05 18:00:03 有 18,341 人看過有 480 人說讚

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水素イオン濃度とpH｜水のイオン積【高校化学】酸と塩基＃３

水素イオン濃度とpH、水のイオン積のポイントは！ ✅水素イオン濃度と水酸化物イオン濃度は「親玉のモル濃度×電離度×価数」 ✅濃度は[ ]を使って表す。（水素イオン濃度→[H+]） ✅どんな水溶液でも...

2021-04-02 18:00:14 有 9,137 人看過有 190 人說讚

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小学生でも２秒で暗算する方法

２桁×２桁の算数暗算テクニックを紹介します。数学や暗算が苦手な方でも瞬時に計算できる裏技にはからくりがあります。成り立つ理屈もしっかり証明していきます。２桁×２桁の式が ✅十の位が同じ ✅一の位を...

2021-03-29 18:00:06 有 27,255 人看過有 734 人說讚

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定義と定理・二等辺三角形の性質【中学数学】平面図形＃８

二等辺三角形の性質・定義と定理のポイントは！ ✅二等辺三角形とは２つの等しい辺を持つ三角形のこと ✅二等辺三角形の等しい辺で挟まれた角を頂角、残り２つの角を底角という ✅二等辺三角形の性質 ❶二等辺三...

2021-03-27 18:00:10 有 4,135 人看過有 125 人說讚

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【裏技】三平方の定理を３秒で計算できる神・テクニック！#Shorts

#Shorts #shorts ▶︎参考にさせていただいたチャンネル https://www.youtube.com/channel/UCZUPMvvW1ggn4gbSY741LdA/about ...

2021-03-23 18:30:01 有 316,571 人看過有 14,378 人說讚

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【先生に拡散希望】AIが自動追尾するWebカメラ「OBSBOT Tiny」│オンライン授業・セミナー講師必見！

🔥拡散希望🔥 全国的に学校がオンライン授業の導入を余儀なくされる中、全国の先生のオンライン授業をスタートする手助けになれば、この状況を少しでも救えるのではないかと考え、この動画を作成しました。一人でも...

2021-03-21 18:00:02 有 4,249 人看過有 85 人說讚

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電離度と価数【高校化学】酸と塩基＃２

電離度の強弱と価数のポイントは！【電離度と価数】 ✅ある酸塩基を水に溶かしたときの全部の分子とイオンに分かれた分子の割合のことを電離度という！ ✅電離度がほぼ0.1の酸や塩基を弱酸・弱塩基といって ...

2021-03-15 18:00:05 有 11,455 人看過有 322 人說讚

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【保存版】勉強効率を爆上げ”40の鍵”│朝型になるコツ│勉強に一番最適な時間は？│朝型,夜型どっちがいい？成功,失敗例から学ぶメリット,デメリット│生活習慣を変えるスケジュール方法。【塗りつぶせ】

朝型,夜型のメリット,デメリットを17万人以上のチャンネル登録者に調査！勉強や仕事の効率化のカギになる事例を40個にまとめました。朝型生活のはじめかたや、生活習慣を変えるスケジュール管理方法、勉強に一...

2021-03-13 18:00:04 有 8,931 人看過有 368 人說讚