Tesuto De Tsukae Ru! (19 X 999 … (Mugen)) Mahou No Anzan Doriru – Japanese Book | テストで使える！ 「19×999…（むげん）」魔法の暗算ドリル
Original Japanese edition of Tesuto De Tsukae Ru! (19 X 999 … (Mugen)) Mahou No Anzan Doriru by Suginohara Maki, published by Cs Shuppan (2023). Japanese Book. The text is in Japanese. Ships worldwide from Japan.
「魔法の暗算法」が身に付く書き込み式ドリル。 1）世界一速い／2）19×無限ケタまで、ケタ数の多い計算もできる／3）学校や塾のテストで自信をもって使える／4）円周率3.14×19の暗算がかんたんにできる／5）おもしろくて、自分から進んで暗算したくなる など、画期的なメソッドを解説。19×19まではもちろん、19×99、さらに19×3ケタ以上＝無限の暗算ができるようになります。切って使える計算カード付き!! （目次） ◇はじめに 世界一かんたんで、速い暗算法 《解説1 指計算》 指で数字を表す 《解説2 19×1ケタの計算》 指で表した数が答えの2ケタ目 《解説3 九去法》 自分で答え合わせをする方法 《解説4 19×19の計算》 指で表す数をかけられる数に足す 《解説5 19×99の計算》 ポイントは「はみ出す数」 《解説6 19×無限の計算》 ケタ合わせに注意 ◇コラム 円周率を使う計算で使える！ ◇19×無限 総まとめテスト ◇あとがき 自信をもって暗算してください！ ◇答え
About condition
Minor shelf wear from distribution (light rubbing, small creases on the obi or dust jacket) is considered normal for new books and is not a defect.
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