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无论哪个年级的数学教材,在讲一种应用题之前总是先安排有关的式子题和文字题的训练作铺垫。这不仅是循序渐进原则的需要,还暗喻出了知识的层次和这些知识的教学要求的隶属关系。 式子题在小学阶段是指用运算符号和括号把两个或几个数有机地串联起来的一种形式。式子题主要是培养学生的计算能力,其内容广泛,包括四则计算及四则混合运算,口算、简算、化简及求未知数的值等。
No matter what grade of math textbooks, before you talk about an application topic always arrange the relevant subheadings and text questions to pave the way for training. This is not only the need for a step-by-step principle, but also a metaphor for the affiliation of the level of knowledge with the teaching requirements of those knowledge. In elementary school, the subtopic is a form of organically concatenating two or more numbers with arithmetic symbols and parentheses. The subtopic is mainly to cultivate students' computing abilities. It covers a wide range of topics, including four calculations and four mixed calculations, accounting calculations, calculations, simplifications and unknowns.