问题 解答题
解比例.
(1)
16
3
2
5
=
16
7
:x
(2)X:8=0.125:0.25(3)
1.8
x
=
2
5
(4)
4.8
0.6
=
x
12
答案

(1)

16
3
2
5
=
16
7
:x,

16
3
x=
2
5
×
16
7

16
3
x÷
16
3
=
32
35
÷
16
3

x=

6
35

(2)X:8=0.125:0.25,

0.25x=8×0.125,

0.25x÷0.25=1÷0.25,

x=4;

(3)

1.8
x
=
2
5

2x=1.8×5,

2x÷2=9÷2,

x=4.5;

(4)

4.8
0.6
=
x
12

0.6x=4.8×12,

0.6x÷0.6=57.6÷0.6,

x=96.

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