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一、缩句法就是把原题缩成用和、差、积、商表示的短语,找到数量关系,运算方法和运算顺序,再列式计算。例从24.5里减去4.8与3.5的积,再减去4除18的商,差是多少?原题可缩成:一个数-积-商=差根据题中的已知数据,列成算式24.5-4.8×3.5-18÷4二、分节法就是根据题目的特点,将原题划为若干小节,分节列式,然后列出综合式。
First, the condensed sentence is the original title reduced to use and, poor, product, quotient expression of the phrase, to find the number of relations between the method of operation and computing sequence, and then out-calculated. Example subtracts the product of 4.8 and 3.5 from 24.5 and subtracts the quotient of 4 and 18, what is the difference? The original title can be reduced to: a number - product - quotient = poor According to the title of the known data, 24.5-4.8 × 3.5-18 ÷ 4 Second, sub-section method is based on the characteristics of the topic, the original title is divided into sections, sub-section column type, and then lists the integrated.