2.5h=()min=()s 120s=()min=()h
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150.9000.2.最后那个除不尽三十分之一小时
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6h=___s=___min 72s=___min
0.5h= ____min =_____s
0.5h=?min=?s
45min=______h=_______s
5h= s 50km= 微米 300s= min
(1)1km/h= km/min =m/s (2)8m/s= m/min =km/s
36min30s=()h
30km/S=KM/H120KM/H= M/S25M/S= KM/H36KM/H= M/S10M/S= KM/MIN K
60Km/h等于多少m/min 120CM/min等于多少m/s
2h 30min = _ h= _ min ,1h 15min = _min