時間單位換算: ①、0.25h=_____min =_______s.②、3.6×10^9 ms= _______h. ③、3h 20min 15s =____s
0.25h=__15___min =____900___s.
3.6×10^9 ms= ____1000___h
3h 20min 15s = 12015____s
不清楚可以追問哦
0.25h=__15___min =____900___s.
3.6×10^9 ms= ____1000___h
3h 20min 15s = 12015____s
不清楚可以追問哦