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零和被除数、除数以及商的概念非常重要,而学生往往难于理解和掌握。教师必须根据零和乘法、除法的意义列举一些实际例子帮助同学分析和推理。零与被除数。在乘法里已知0乘以任何数都得0,如0×4=0。这个乘法算式中:积是0,两个因数分别是0和4。如果反过来要求0这个因数呢?根据除法的意义,已知积和其中一个因数,求另一个因数,而积是被除数,就得到0÷4=0。通过此例可以说明:零是可以做被除数的,零除以一个任何不等于0的数结果都得0。
The concepts of zero and dividend, divisor, and quotient are very important, and students are often hard to understand and master. Teachers must give some practical examples to help students analyze and reason according to the meaning of zero and multiplication and division. Zero and dividend. It is known in multiplication that 0 multiplies any number to 0, for example 0 × 4 = 0. In this multiplicative formula: the product is zero and the two factors are 0 and 4, respectively. If, in turn, the factor 0 is required? According to the division, we know the product and one of the factors, find another factor, and the product is the dividend, we get 0 ÷ 4 = 0. By this example can be explained: zero can be done by the dividend, zero divided by a non-zero number of results have 0.