问题 解答题
解比例.
(1)x:0.3=0.4:0.6
(2)
3.5
0.4
=
x
8

(3)
1
18
:X=5:36
(4)
x
6
=40:3
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)

1
18
:X=5:36,

5X=

1
18
×36,

5X=2,

X=2÷5,

X=0.4,

(4)

x
6
=40:3,

3X=40×6

X=

40×6
3

X=80.

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