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应用除法的商不变性质,可以使一些除法计算更为简便,但应用商不变性质对一些有余数的除法进行简便计算时,学生因不能正确地判定余数的多少,常常造成计算错误。原因何在呢?据了解,主要有如下两个方面。一、学生误认为余数也是商。在教学中有的教师没有注意到这一点,对于有余数的除法的计算结果,经常用“甲数除以乙数,商是几余几”这样的形式来对学生表述。于是,一些学生也以为不完全商和余数都叫做商,
Applying the quotient invariant property of the division, you can make some of the division calculation more simple, but the application of invariant property of some simple division of the remainder of simple calculation, the students can not correctly determine the number of the remainder, often resulting in calculation error. What is the reason? It is understood that there are mainly two aspects as follows. First, the students mistakenly believe that the remainder is also a business. Some teachers in teaching did not notice this point, for the division of the remainder of the calculation results, often with “a divided by the number of B, the business is a few more” to the students to express. Thus, some students also think that the incomplete quotient and the remainder are called quotient,