化简整数比:
1.5:2.5
=(1.5×2):(2.5×2)
=3:5
60:32
=(60÷4):(32÷4)
=15:8
0.45:0.2
=(0.45×20):(0.2×20)
=9:4
3/7:5/6
=3/7÷5/6
=3/7×6/5
=18/35
=18:35
625毫升:3/8升
=625毫升:0.375升
=625毫升:375毫升
=(625÷125):(375÷125)
=5:3
9千克:300克
=9000克:300克
=(9000÷300):(300÷300)
=30:1
0.2小时:20分钟
=12分钟:20分钟
=(12÷4):(20÷4)
=3:5
把下面各比化成后项是100的比:
214:200
=(214÷2):(200÷2)
=107:100
18:25
=(18×4):(25×4)
=72:100