Teacher Tsai Shu-ying states that the purpose of "starting from the students 'previous experience" is to grab hold of students' "feeling for math." Once students have the feeling for this kind of participation, discussion and dialogue, their interest in math greatly increases. And at that point it's easy to explain fractional operations and introduce word problems.
蔡淑英老師表示，這叫「先從孩子的前置經驗出發」，目的是抓出孩子的「數學感」，小孩有了這種參與、討論，對話的感覺後，數學興趣自然提昇，然後再來講解分數運算，實用例題等，就很順手了。