时间单位转换
问题描述：
时间单位转换
一写初二上学期的时间单位转换 要用科学记数法的用科学记数法
(1)2min=__________=____h
(2)2h=__________=____min
2h=__________=____s
(3)30min=__________=____h
30min=__________=____s
(4)45min=__________=____h
(5)120s=__________=____min
120s=__________=____h
(6)1800s=__________=____h
答
(1)2min=2/60h=1/30h
(2)2h=2*60min=120min
2h=2*3600s=7200s
(3)30min=30/60h=0.5h
30min=30*60s=1800s
(4)45min=45/60h=0.75h
(5)120s=120/60min=2min
120s=120/3600h=1/30h
(6)1800s=1800/3600h=0.5h
这种题还要怎么写过程?.