题目内容
求比值
(1)16:20
(2)3л:2л
(3)8:1
(4)0.5:0.25
(5)
:
(6)0.05:8.
(1)16:20
(2)3л:2л
(3)8:1
(4)0.5:0.25
(5)
3 |
4 |
9 |
16 |
(6)0.05:8.
考点:求比值和化简比
专题:比和比例
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:(1)16:20
=16÷20
=0.8;
(2)3л:2л
=3n÷2n
=1.5;
(3)8:1
=8÷1
=8;
(4)0.5:0.25
=0.5÷0.25
=2;
(5)
:
=
÷
=
;
(6)0.05:8
=0.05÷8
=0.00625.
=16÷20
=0.8;
(2)3л:2л
=3n÷2n
=1.5;
(3)8:1
=8÷1
=8;
(4)0.5:0.25
=0.5÷0.25
=2;
(5)
3 |
4 |
9 |
16 |
=
3 |
4 |
9 |
16 |
=
4 |
3 |
(6)0.05:8
=0.05÷8
=0.00625.
点评:求比值的结果是一个数,可以是整数、小数或分数.
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