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4除以25的竖式怎么列
一、竖式
4除以25的竖式如下:
二、解析
在4除以25中,被除数比除数小,所以商的个位先写上0占位,然后把4的后面加0,用40÷25=1余15,在15后面加0,150÷25=6。
最后得出:4÷25=0.16
结论:被除数比除数小吋,整数部分不够商1,要先在商的个位写0占位。
三、拓展
小数除法的法则:
1、除数是整数的小数除法法则:
(1)按照整数除法的法则去除,商的小数点要和被除数的小数点对齐;
(2)如果除到被除数的末尾仍有余数,就在余数后面补零,再继续除。
2、除数是小数的小数除法法则:
(1)先看除数中有几位小数,就把被除数的小数点向右移动几位,数位不够的用零补足;
(2)然后按照除数是整数的小数除法来除 。