题目内容
化简比并求比值 0.5吨:200千克 |
|
分析:先把比的两项的单位统一,再根据比的基本性质作答,即比的前项和后项同时乘或除以一个数(0除外)比值不变;
先把比的两项的单位统一,再用比的前项除以后项即可.
先把比的两项的单位统一,再用比的前项除以后项即可.
解答:解:(1)0.5吨:200千克,
=500千克:200千克,
=500:200,
=(500÷100):(200÷100),
=5:2,
0.5吨:200千克,
=500千克÷200千克,
=2.5;
(2)
时:40分,
=48分:40分,
=48:40,
=(48÷8):(40÷8),
=6:5;
时:40分,
=48分÷40分,
=1.2.
=500千克:200千克,
=500:200,
=(500÷100):(200÷100),
=5:2,
0.5吨:200千克,
=500千克÷200千克,
=2.5;
(2)
4 |
5 |
=48分:40分,
=48:40,
=(48÷8):(40÷8),
=6:5;
4 |
5 |
=48分÷40分,
=1.2.
点评:注意无论是化简比还是求比值都要先把比的前后项的单位统一,求的结果都不带单位.
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