题目内容

求出下面各比的比值
6:
1
3
=
2.5:3.5= 1.2:120=
3.6:1
1
2
=
9:0.45=
3
8
1
8
=
分析:用比的前项除以比的后项来求比值.
解答:解:(1)6:
1
3

=6÷
1
3

=18,

(2)2.5:3.5,
=2.5÷3.5,
=
5
7

 
(3)1.2:120,
=1.2÷120,
=0.01,

(4)3.6:1
1
2

=3.6÷1.5,
=2.4,

(5)9:0.45,
=9÷0.45,
=20,

(6)
3
8
1
8

=
3
8
÷
1
8

=3.
点评:本题主要考查了学生对求比值方法的掌握.
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