问题 解答题
2
3
4
15
2.5:2.75     
0.5吨:25千克    0.6千米:180米.
答案

(1)

2
3
4
15

=(

2
3
×15):(
4
15
×15),

=10:4,

=5:2;

2
3
4
15

=5:2,

=5÷2,

=

5
2

(2)2.5:2.75,

=(2.5×20):(2.75×20),

=50:55,

=10:11;

2.5:2.75,

=10:11,

=10÷11,

=

10
11

(3)0.5吨:25千克,

=500千克:25千克,

=(500÷25):(25÷25),

=20:1;

 0.5吨:25千克,

=20:1,

=20÷1,

=20.

(4)0.6千米:180米,

=600米:180米,

=(600÷60):(180÷60),

=10:3;

0.6千米:180米,

=10:3,

=10÷3,

=

10
3

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