问题 解答题
解比例.
3.5:x=0.7:1.2   

2.5:x=0.4:0.2
3.5
0.7
=
8
Χ
5
6
=
4
Χ
答案

(1)3.5:x=0.7:1.2,

0.7x=3.5×1.2,

0.7x÷0.7=4.2÷0.7,

x=6;

(2)2.5:x=0.4:0.2,

0.4x=2.5×0.2,

0.4x÷0.4=0.5÷0.4,

x=1.25;

(3)

3.5
0.7
=
8
x

3.5x=0.7×8,

3.5x÷3.5=5.6÷3.5,

x=1.6;

(4)

5
6
=
4
x

5x=6×4,

5x÷5=24÷5,

x=4.8.

问答题
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