题目内容

求出下面各比的比值.
45:9=
0.7:1.4=
1
5
1
4
=
18:27=
0.21:2.1=
1
8
1
7
=
3:19= 9.1:0.7=
0.125:
1
8
=
81:3= 1:0.7= 0.25:
3
4
=
4:12= 0.7:1=
1
6
1
2
=
分析:用比的前项除以比的后项来求比值.据此解答.
解答:
解:45:9=5 0.7:1.4=0.5
1
5
1
4
=0.8
18:27=
2
3
0.21:2.1=0.1
1
8
1
7
=0.875
3:19=
3
19
9.1:0.7=13
0.125:
1
8
=1
81:3=27 1:0.7=1
3
7
0.25:
3
4
=
1
3
4:12=
1
3
0.7:1=0.7
1
6
1
2
=
1
3
点评:本题主要考查了学生对求比值方法的掌握情况.
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