4分之1吨:125千克
=1/4×1000:125
=250:125
=2:1
=2
15分:4分之1时
=15:1/4×60
=15:15
=1;1
=1
8时:2分之1天
=8:1/2×24
=8:12
=2:3
=2/3
2时:30分
=2×60:30
=120:30
=4:1
=4
4分之1吨:125千克
=1/4×1000:125
=250:125
=2:1
=2
15分:4分之1时
=15:1/4×60
=15:15
=1;1
=1
8时:2分之1天
=8:1/2×24
=8:12
=2:3
=2/3
2时:30分
=2×60:30
=120:30
=4:1
=4