超わかる！授業動画

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ダニエル型電池【高校化学】酸化還元＃６

ダニエル型電池のポイントをまとめるよ！ ✅酸化還元反応でやり取りする電子のエネルギーを取り出そうとして作られたのが電池。 ✅亜鉛と銅イオンの酸化還元をメインの反応として亜鉛を片方の電極に、銅イオンを...

2021-08-07 18:00:31 有 2,758 人看過有 81 人說讚

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三角形の相似条件【中学数学】平面図形＃１２

三角形の相似条件のポイントは！ ✅相似とは大きさは違うけど形が同じ図形であること ✅回転したり、裏返したりしても、形が同じなら相似になる ✅三角形の相似条件は３つ ❶三組の辺の比がすべて等しい ❷ 2...

2021-08-05 18:00:04 有 2,681 人看過有 106 人說讚

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【証明】外角の二等分線の定理【高校数学】公式の証明＃２２

外角の二等分線の定理を証明します。 ✅「外角の二等分線の定理」の授業動画授業動画▶https://youtu.be/sT93XHINI8s 演習動画▶https://youtu.be/8mC0kL...

2021-08-03 18:00:32 有 4,428 人看過有 197 人說讚

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【19×19までの暗算】小学生が中学受験塾で習う暗算のコツ#shorts

19×19までのイメージ暗算法は、中学受験する小学生たちが中学受験専門塾で習う面積図を利用した暗算テクニック。この暗算のコツを２分で紹介します。面積図を使うと、今までシェアしてきた暗算の裏技や、中学で...

2021-08-02 18:00:14 有 10,057 人看過有 410 人說讚

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【19×19までの暗算】小学生が中学受験塾で習う暗算のコツ

2021-07-31 18:00:29 有 7,886 人看過有 477 人說讚

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金属のイオン化傾向【高校化学】酸化還元＃５

金属のイオン化傾向のポイントをまとめるよ！ ✅「金属のイオン化傾向」は「リッチに貸そうかな、まああてにすんなひどすぎる借金」 ✅左に行けば行くほどイオンになりやすく、右に行けば行くほどイオンになりにく...

2021-07-28 18:00:05 有 3,623 人看過有 95 人說讚

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等積変形（平行線と面積）【中学数学】平面図形＃１１

等積変形（平行線と面積）のポイントは！ ✅等しい面積の変形を等積変形という ✅等積変形は三角形の身体測定 ❶底辺を釘で固定する ❷地面と平行な棒を降ろして、頭に直撃したときの身長を図る ❸三角形の頭を...

2021-07-26 18:00:20 有 2,890 人看過有 129 人說讚

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硫酸酸性とは？【高校化学】酸化還元

硫酸酸性のポイントをまとめるよ！ ✅過マンガン酸イオンは中性や塩基性のときより、酸性のほうがより強い酸化剤としてはたらくから酸性にしている！ ✅酸性にするとき、硝酸だと還元剤と反応してしまう。塩酸なら...

2021-07-21 18:00:04 有 3,903 人看過有 164 人說讚

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【証明】内角の二等分線の定理【高校数学】公式の証明＃２１

内角の二等分線の定理を証明します。 ✅「内角の二等分線の定理」の授業動画授業動画▶https://youtu.be/sT93XHINI8s 演習動画▶https://youtu.be/8mC0kL...

2021-07-19 18:00:31 有 2,351 人看過有 126 人說讚

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フィードバックは重要ですよね？① ＃Shorts

⚡『超わかる！授業動画』とは⚡ 中高生向けのオンライン授業をYouTubeで完全無料配信している教育チャンネルです。 ✅中高生用の学校進路に沿った網羅的な授業動画を配信。 ✅動画編集で文字や図を動かし...

2021-07-16 18:00:17 有 4,830 人看過有 133 人說讚