问题 解答题
化简下面各比.
8
5
2
3
4.5:2.712:162:0.5.
答案

(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.

单项选择题 A1型题
单项选择题