植树节学校组织学生去栽树，全校6个年级全部参加，每个年级2个班一共 540÷6÷2＝45棵平均每个班栽45棵
学校组织植树节种树活动，要求每个年级的学生都参加，男生每人种6棵，女生每2人种5棵。在四（1）班4 女生1人种2.5棵假设全是男生女生=（40×6-184）÷（6-2.5）56÷3.52×56÷72×816（人）男生=40-16=24（人）
英语作文（通知类型）：3月12日是植树节，我校将组织全体学生参加植树活动 Comrades，Attention，please。March 12 is our Tree Planting Day.We have decided to go and plant trees that day.All the students in our school are supposed(required)to take part in the activity.Each class must take five or six basins to water the young trees.Others are to take spades to dig holes.We are going to gather on the school playground at seven on the morning of March 12.And then，we will take our school bus to the West Hill.Please don't be late or absent.Thank you.
