同学们种了45棵杨树,30棵柳树,种的杨树比柳树多多少棵?+x,S,`.x2V(^8O8X0}:p*H-S
算式:提示9}.Q4[3H8J'p'W8F/`8d'y(t)T+x,S,`.x2V(^8O8X0}:p*H-S
答:种的杨树比柳树多5W/t3g棵。+x,S,`.x2V(^8O8X0}:p*H-S