A:3,1
B:-3,1
C:3,-1
D:1,3
She likes eating____(fish)very much.
一年级种了56棵树,一班种了19棵,二班种了18棵,估计一下,三班可能种多少棵?再列式算一算,检查你估计的对不对?
□○□○□=□(棵)