=(60÷4):(32÷4),
=15:8;
(2)0.45:0.2,
=(0.45×100):(0.2×100),
=45:20,
=9:4;
(3)
3 |
7 |
5 |
6 |
=(
3 |
7 |
5 |
6 |
=18:35;
(4)625毫升:
3 |
8 |
=625毫升:375毫升,
=(625÷125):(375÷125),
=5:3;
(5)9千克:300克,
=9000克:300克,
=(9000÷300):(300÷300),
=30:1;
(6)0.2小时:20分钟,
=12分:20分,
=(12÷4):(20÷4),
=3:5.