问题
解答题
解比例. (1)x:0.3=0.4:0.6 (2)
(3)
(4)
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答案
(1)x:0.3=0.4:0.6,
0.6x=0.3×0.4,
x=
,0.3×0.4 0.6
x=0.2,
(2)
=3.5 0.4
,x 8
0.4x=3.5×8,
x=
,3.5×8 0.4
x=70,
(3)
:X=5:36,1 18
5X=
×36,1 18
5X=2,
X=2÷5,
X=0.4,
(4)
=40:3,x 6
3X=40×6
X=
,40×6 3
X=80.