爸爸从第1 根电线杆到第12根电线杆用了12分钟,他如果走到24分钟应走到第几根电线杆?
5个回答

12÷(12-1),

=12÷11,

=1211(个),

24÷

1211+1,

=24×1112+1,

=22+1,

=23(根);