化简比、求比值:5.4:18 20分钟:2小时 &...

化简比、求比值:5.4:18 20分钟:2小时 3吨:600千克.

5.4:18,
=(5.4×10):(18×10),
=54:180,
=(54÷18):(180÷18),
=3:10;

5.4:18,
=5.4÷18,
=0.3;

20分钟:2小时,
=20分钟:120分钟,
=20:120,
=(20÷20):(120÷20),
=1:6;

20分钟:2小时,
=20分钟:120分钟;
=20÷120,
=
1
6


3吨:600千克,
=3000千克:600千克,
=3000:600,
=(3000÷600):(600÷600),
=5:1;

3吨:600千克,
=3000千克:600千克,
=3000:600,
=3000÷600,
=5.
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