1.有蓝布60米,比黄布的2倍多1/4,黄布有几米?2.有蓝布60米,黄布比蓝布的2倍多1/4,黄布几米?3.蓝布60米,黄布比蓝布的2倍1/4少2米,黄布几米?4.蓝布60米,黄布比蓝布的1/4多2米,黄布几米?

分类: 作业答案 • 2021-12-19 17:03:42

问题描述：

1.有蓝布60米,比黄布的2倍多1/4,黄布有几米?
2.有蓝布60米,黄布比蓝布的2倍多1/4,黄布几米?
3.蓝布60米,黄布比蓝布的2倍1/4少2米,黄布几米?
4.蓝布60米,黄布比蓝布的1/4多2米,黄布几米?

答

1.黄布28米设黄布为x 则 2x(1+1/4)=60
2.150米 (60*2)(1+1/4)=150米
3.28米 60*2*(1/4)-2=28
4.17米 60*（1/4）+2=17

答

(1).2x+2x*1/4=60
2.5x=60
x=24
(2).60*2*(1+1/4)
=120*5/4
=150
(4).60*1/4+2=17