求(1/2+1/4+1/6+1/8)×(1/4+1/6+1/8+1/10)-(1/2+1/4+1/6+1/8+1/10)×(1/4+1/6+1/8)等于几分之几?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/23 23:43:16
![求(1/2+1/4+1/6+1/8)×(1/4+1/6+1/8+1/10)-(1/2+1/4+1/6+1/8+1/10)×(1/4+1/6+1/8)等于几分之几?](/uploads/image/z/11650281-33-1.jpg?t=%E6%B1%82%EF%BC%881%2F2%2B1%2F4%2B1%2F6%2B1%2F8%EF%BC%89%C3%97%EF%BC%881%2F4%2B1%2F6%2B1%2F8%2B1%2F10%EF%BC%89-%EF%BC%881%2F2%2B1%2F4%2B1%2F6%2B1%2F8%2B1%2F10%EF%BC%89%C3%97%EF%BC%881%2F4%2B1%2F6%2B1%2F8%EF%BC%89%E7%AD%89%E4%BA%8E%E5%87%A0%E5%88%86%E4%B9%8B%E5%87%A0%3F)
求(1/2+1/4+1/6+1/8)×(1/4+1/6+1/8+1/10)-(1/2+1/4+1/6+1/8+1/10)×(1/4+1/6+1/8)等于几分之几?
求(1/2+1/4+1/6+1/8)×(1/4+1/6+1/8+1/10)-(1/2+1/4+1/6+1/8+1/10)×(1/4+1/6+1/8)等于几分之几?
求(1/2+1/4+1/6+1/8)×(1/4+1/6+1/8+1/10)-(1/2+1/4+1/6+1/8+1/10)×(1/4+1/6+1/8)等于几分之几?
20分之1
设1/4+1/6+1/8为x 所以原式是(1/2+x)×(x+1/10)-(1/2+x+1/10)×x=(x的平方+5分之3倍的x+20分之1)-(x的平方+5分之3倍的x)=20分之1