简便运算,快64乘9.9(简便运算,今天晚上马上要!)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/29 01:38:29
![简便运算,快64乘9.9(简便运算,今天晚上马上要!)](/uploads/image/z/5427500-68-0.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%2C%E5%BF%AB64%E4%B9%989.9%EF%BC%88%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%2C%E4%BB%8A%E5%A4%A9%E6%99%9A%E4%B8%8A%E9%A9%AC%E4%B8%8A%E8%A6%81%21%EF%BC%89)
简便运算,快64乘9.9(简便运算,今天晚上马上要!)
简便运算,快
64乘9.9(简便运算,今天晚上马上要!)
简便运算,快64乘9.9(简便运算,今天晚上马上要!)
64*9.9
=64*(10-0.1)
=64*10-64*0.1
=640-6.4
=633.6
64*10-64*0.1=633.6
64
* 9.9
------
576
576
-------
633.6
64*10-64*0.1
=640-6.4=633.6