1）0.44*1000*3600J=1584000J

2）15min=0.25h

P=0.44/0.25KW=1.76KW

3）R=U^2/P=220^2/1.76*1000=27.5欧姆

I=220/27.5=8A

44除以25的简便怎么做

44÷25

=44÷（25x4÷4）

=44÷100x4

=0.44x4

=1.76