About 一桁速算トライ
答えが一桁になる四則演算を出来るだけ速く答えるゲームです。
答えが一桁でテンポ良く回答可能です。
脳年齢を判定する機能付です。 The answer is the fast answer game as much as possible the four arithmetic operations to become an order of magnitude.
Answer is possible tempo well answer in one digit.
It is with the function of determining the brain age.