選擇從3個級別劃分款項從基本到三個數字的問題。它包括的問題,其中有一餘數。每個總和隨機產生一次在黑板上風格界面。音頻和視頻的鼓勵讓你知道當你是對的,當你需要再次嘗試的。有一個工廠打印出來和/或保存個性化的證書,以鼓勵改善。...
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免費 數學軟件 為 Windows Me
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