问题
解答题
求未知数x. x-0.25=
|
答案
(1)x-0.25=
,1 4
x-0.25+0.25=0.25+0.25,
x=0.5;
(2)
:1 20
=x:0.8,1 5
1:4=x:0.8,
4x=0.8,
4x÷4=0.8÷4,
x=0.2.
求未知数x. x-0.25=
|
(1)x-0.25=
,1 4
x-0.25+0.25=0.25+0.25,
x=0.5;
(2)
:1 20
=x:0.8,1 5
1:4=x:0.8,
4x=0.8,
4x÷4=0.8÷4,
x=0.2.