①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )
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①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm
请帮忙``急用`!
请帮忙``急用`!
![①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )](/uploads/image/z/16120056-48-6.jpg?t=%E2%91%A030S%3D%28+%29%3D%28+%29min+%E2%91%A10.2h%3D%28+%29%3D%28+%29S+%E2%91%A245min%3D%28+%29%3D%28+%29h+%E2%91%A3500m%3D%28+%29%3D%28+%29)
①30s=(30/60min )=(0.5 )min
②0.2h=( 0.2*3600S)=(720)s
③45min=(45/60h )=(0.75 )h
④500m=( 500*1000mm)=(500000)mm
②0.2h=( 0.2*3600S)=(720)s
③45min=(45/60h )=(0.75 )h
④500m=( 500*1000mm)=(500000)mm
1.08km/min=?m/s=?km/h
1.2km/min= m/s或 km/h
如1km/h= m/s 1m/min= km/min .
1m/s=-----cm/min 1km/h=----m/min
3km/min=()m/s 60m/min=()km/h
如5km/min= km/h= m/h= km/s= m/s
1km/min=?km/h=?m/h=?km/s= m/s
1m/s=_____m/min=______km/h:15m/s=____km/h
1.5h=------min=-----s,90s=----min=-----h
(1)1km/h= km/min =m/s (2)8m/s= m/min =km/s
40m\s=( )km\h 3km\min=( )km\min
0.25h=( )min