试题:
化简下面各比.
8
5
2
3
4.5:2.712:162:0.5.
比的化简 2016-05-21

答案:

我来补答
(1)
8
5
2
3

=(
8
5
×15):(
2
3
×15),
=24:10,
=12:5;

(2)4.5:2.7,
=(4.5×10÷9):(2.7×10÷9),
=5:3;

(3)12:16,
=(12÷4):(16÷4),
=3:4;

(4)2:0.5,
=(2×2):(0.5×2),
=4:1.
 
 
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