问题 解答题
(1)0.25:x=7.5:15
(2)x:8=3:0.5
(3)8:x=
3
4
1
2

(4)6.5:x=3.25:4.
答案

(1)0.25:x=7.5:15,

7.5x=0.25×15,

7.5x÷7.5=3.75÷7.5,

x=0.5;

(2)x:8=3:0.5,

0.5x=3×8,

0.5x÷0.5=24÷0.5,

x=48;

(3)8:x=

3
4
1
2

3
4
x=8×
1
2

3
4
3
4
=4÷
3
4

x=

16
3

(4)6.5:x=3.25:4,

3.25x=6.5×4,

3.25x÷3.125=26÷3.25,

x=8.

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