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根据“九义”教材的编排,引入“因数”的概念之后。在解答应用题时,可以不再区分放乘数和乘数,怎佯计算简便,就怎样列式。这样处理既与乘法交换律相吻合,又与初中代数知识相衔接,真谓明智之举。但有部分教师对此持不同意见,认为这样处理有悖于乘法的意义,算理错误。特别是今后学习分数乘法应用题,需再回头重新强调被乘数和乘数的位置,岂不自找麻烦?
According to “nine justice” textbook arrangement, the introduction of “factor” after the concept. When answering application questions, you can no longer distinguish between multiplier and multiplier, how to calculate simple, how the column. This treatment is not only coincides with the law of multiplicative exchange, but also with the junior high school algebra knowledge, really makes sense. However, some teachers hold different opinions about this and think that such a treatment runs counter to the meaning of multiplication and makes mistakes in arithmetic. Especially in the future to learn the score multiplication problem, need to re-emphasize the location of multiplicand and multiplier, would not asking for trouble?