What textbook committee members and teachers had in mind was to train students to think, so a teacher should realize that for students who are already adept at direct calculations, the new approach shouldn't be a restriction, but should simply help them understand the implicit content underlying the direct calculations.
教科書委員和老師希望訓練學生思考，自己更該想到，對已經熟練直式演算的學生來說，不是限制，而是幫助他們理解直式演算的隱含意涵。