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在两位数除多位数或多位数除多位数的运算中,儿童最感困难的便是试商問題。如何指导儿童掌握确定初商的規律呢?茲以三体数除三位数及三位数除四位数为例,作簡要的说明如下:
In addition to multi-digit or multi-digit double-digit operation in addition to multi-digit, the most difficult children is the trial business problem. How to guide children to master the law to determine the beginning of the business? Here are three-digit addition to three-digit and three-digit addition to the four-digit as an example, a brief description is as follows: