①30S=( )=( )min ②0.2h=( )=( )S ③45min=( )=( )h ④500m=( )=( )mm
来源:百度知道 编辑:UC知道 时间:2024/09/25 14:26:44
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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
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