题目内容
求下列各比的比值
63:21; 12:16; 7:5; 2:0.5; 2.4:0.6; 4:5.
63:21; 12:16; 7:5; 2:0.5; 2.4:0.6; 4:5.
分析:求比值是根据比的意义(两个数相除又叫两个数的比),用比的前项除以比的后项.
解答:解:63:21
=63÷21
=3;
12:16
=12÷16
=0.75;
7:5
=7÷5
=1.4;
2:0.5
=2÷0.5
=4;
2.4:0.6
=2.4÷0.6
=4;
4:5
=4÷5
=0.8.
=63÷21
=3;
12:16
=12÷16
=0.75;
7:5
=7÷5
=1.4;
2:0.5
=2÷0.5
=4;
2.4:0.6
=2.4÷0.6
=4;
4:5
=4÷5
=0.8.
点评:此题主要考查了求比值的方法,注意求比值的结果是一个商,可以是整数、小数或分数.
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