①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm请帮忙``急用`!

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①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm请帮忙``急用`!

①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm请帮忙``急用`!
①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm
请帮忙``急用`!

①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm请帮忙``急用`!
①30s=(30/60min )=(0.5 )min
②0.2h=( 0.2*3600S)=(720)s
③45min=(45/60h )=(0.75 )h
④500m=( 500*1000mm)=(500000)mm

30/60min 0.5
0.2*60*60s 720
45/60h 0.75
500*100*10mm 800000

(1)0.5 (2)12 (3) 2/3 (4) 50000 都是最后的空

①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm请帮忙``急用`! 900s= min 10s=( )min 20s=( )min 110s=?min 30r/min=____rad/s 30km/min=___m/s 30m/min= 多少 m/s 30cm/min=____m/s 20s=（）min 2.5min=多少s 物理120s= min = s 1cm/min=?m/sRT1cm/min=( )m/s 0.2min= 多少 s= 多少 ns 36 min 30 s=（ ）s=（ ）h 2.4 h=（ ）h=（ ）min 2h= min= s 1h=( )min=( )s 3.6km/s=( )m/min?