问题
解答题
|
答案
(1)5x-5×
=0.8,1 3
5x-
=0.8,5 3
5x-
+5 3
=0.8+5 3
,5 3
5x=
,37 15
5x÷5=
÷5,37 15
x=
;37 75
(2)12:5=x:0.3,
5x=12×0.3,
5x÷5=3.6÷5,
x=0.72;
(3)
=0.45 x
,9 16
9x=0.45×16,
9x÷9=7.2÷9,
x=0.8.