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“除数是小数的除法”是六年制小学数学第九册的重点知识,其计算方法是先把除数转化成整数,然后再按照除数是整数的除法进行计算。这一节教材的重点是:除数是小数的除法转化成除数是整数的除法时小数点的移位法则。其关键是根据除数、被除数同时扩大相同的倍数(0除外),商不变的规律,把除数是小数的除法转化成除数是整数的除法。
The division of the divisor by the decimal number is the key knowledge of the ninth grade of six-year elementary school mathematics, which is calculated by first converting the divisor to an integer and then dividing by a divisor of an integer. The focus of this section of the textbook is: the division of the divisor is a fractional divisor into the divisor is an integer division of decimal point shift rule. The key is based on the divisor, the dividend while expanding the same multiple (except 0), the same rule of business, the divisor is a fraction of the division into divisor division is an integer.