问题
解答题
解方程或比例:(1)
|
答案
(1)
χ+1 4
χ=1 3
,1 2
x=7 12
,1 2
x÷7 12
=7 12
÷1 2
,7 12
x=
;6 7
(2)
=0.25 x
,0.5 0.4
0.5x=0.25×0.4,
0.5x÷0.5=0.1÷0.5,
x=0.2.
解方程或比例:(1)
|
(1)
χ+1 4
χ=1 3
,1 2
x=7 12
,1 2
x÷7 12
=7 12
÷1 2
,7 12
x=
;6 7
(2)
=0.25 x
,0.5 0.4
0.5x=0.25×0.4,
0.5x÷0.5=0.1÷0.5,
x=0.2.