植树节六年级学生去植树,六年级一班植树120棵,六年级二班植树72棵,六年级三班植树48棵.

植树节那天,参加公园植树活动的人很多,其中,不乏老人和孩子.

解题思路：先计算出杉树的棵数，即8×15=120棵，进而得出杨树的棵数，即300-120=180棵，最后依据除法的意义即可得解．

（300-8×15）÷12，
=（300-120）÷12，
=180÷12，
=15（棵）；
答：杨树每行有15棵．

点评：
本题考点： 整数、小数复合应用题．

考点点评： 先计算出杉树的棵数，进而得出杨树的棵数，是解答本题的关键．

妇女节（3.8）植树节（3.12）劳动节（5.1）儿童节（6.1）国庆节（10.1）

解题思路：把杨树的棵数看成单位“1”，它的（1+[4/5]）就是两种树的总棵数63棵，用除法求出杨树的棵数，再用总棵数减去杨树的棵数就是松树的棵数．

63÷（1+[4/5]）
=63÷[9/5]
=35（棵）
63-35=28（棵）
答：松树栽了28棵，杨树35棵．

点评：
本题考点： 分数除法应用题．

考点点评： 本题先找出单位“1”，再找出单位“1”的几分之几对应的数量，用除法求出单位“1”的量．

March 2 is the Arbor Day the teacher took us to the botanical garden planting out at 8:00 in the morning nine reached some digging some load tree some watering everyone very hard

(78-6)除以78

柏树有：280÷（1+3/4）=160（棵）
松树有：160×3/4=120（棵）

设四年级植树x棵.则五年级植树2x+20棵.
x+2x+20=125
3x+20=125
3x+20-20=125-20
3x=105
x=35
答：四年级植树35棵

Last Sunday is the tree-planting day

五年级植树:360×[42／﹙42+48﹚]
=360×﹙42／90﹚
=168（棵）、
六年级植树：360-168=192（棵）

90％

翻译如下： Notice

The 12th of March is Arbor Day. The Student Union will organize all the students to participate the activity of tree planting. All the students shall meeting in the school playground at 7:00 on the morning of March 12th. We will go to the Xishang Mountains to plant trees. Everyone shall join and each class brings 5 to 6 basin for watering the trees.

假设七一班为1份,七二班是一班的3倍,为3份.七三班是二班的2倍,所以是6份.
1+3+6=10份.300/10=30棵/份.
七一班：30×1=30棵
七二班：30×3=90棵
七三班：30×6=180棵

(1)(1-2/5)*(2/3)
(2)1-(1-2/5)*(2/3)*600
(3)2/5*600*0.625

解题思路：“第一小组有12人，第二小组有14人，第三小组有16人”，按照各小组人数分配，先求出总人数，再除树的总棵数63，然后再分别乘各小组的人数，就是3个小组各应栽的棵数．据此解答．

12+14+16=42（人）
63÷42×12
=1.5×12
=18（棵）
63÷42×14
=1.5×14
=21（棵）
63÷42×16
=1.5×16
=24（棵）
答：第一小组应栽18棵，第二小组应栽21棵，第三小组应栽24棵．

点评：
本题考点： 按比例分配应用题．

考点点评： 本题的重点是求出三个组的总人数，再求出每人应栽多少棵，进而根据乘法的意义可求出各组应栽的棵数．

11棵.（50除5）+1

Planting Day
Today is planting day. Our class have a meaningful activity. All of our classmates go to plant flowers outside the school gate. We got the flower seeding
from others. We first cleaned the weeds and then dug small pits. After we put the seeds in the pits, we watering them. Because of this activity, we realize
that working is tired but happy. We decided to take care these flower seeds regularly. And we hope we can see the beautiful flowers quickly.

通知
今日，校方对明日植树节决议如下，明日放假一天，望同学们与明日八点准时于校门口集合，骑自行车去公园植树，自带食物饮料，中午在公园中吃饭。

Tree Planting Day Origin
February 1979,China's fifth meeting of the Sixth National People's Congress Standing Committee decided that the annual March 12 as China's Tree Planting Day; Over the years,the universal voluntary tree-planting campaign showing a vigorous development of the excellent situation.At present,China's voluntary tree-planting ways:direct personal participation in tree planting,tree planting green fees to pay obligations,participate in the voluntary tree-planting publicity.People can choose a way.
Sun Yat-sen and Tree Planting Day
Sun Yat-sen is the modern history of China's earliest aware of the importance of forest afforestation and advocacy leaders.In his writings and speeches,he repeatedly stressed the dangers of deforestation and the importance of afforestation.In 1915,Sun Yat-sen in the initiative,the Government announced to the provisions of the Ching Ming Festival of Tree Planting Day.Due to China's Ching Ming Festival,the tree planting season too late,and to commemorate Dr.Sun Yat-sen,changed the Ching Ming Festival on March 12.
Mao Zedong and the plantation and greening
1956 Mao Zedong issued a "greening the motherland",realizing the "garden of the earth" to the call.China started the "12 Green Campaign" with the objective to "in the 12 years of barren hills and wasteland eliminated in all residential rooms,Cunbang,by the roadside,next to water,on the barren hills and wasteland,that is,in all possible areas is in accordance with the specifications of a tree,a green."
Deng Xiaoping and the Tree Planting Day
In 1979,Deng Xiaoping proposed,the Fifth National People's Congress decision to the Sixth Meeting,the annual anniversary of the death of Dr.Sun Yat-sen - March 12 for China's Tree Planting Day,to commemorate Sun has consistently advocated afforestation Dr.Sun Yat-sen.December 13,1981,to discuss the Fourth Session of the Fifth National People's Congress adopted the "universal voluntary tree-planting campaign in the resolution." This is the founding of new China,the highest national authority on the greening of the motherland's first major resolution.Since then,the universal voluntary tree-planting campaign as a legal begin in the country.The Tree Planting Day in 1982,Comrade Deng Xiaoping set examples in the Beijing Yuquan foot of the mountain under a kind of voluntary tree-planting campaign of a tree.(可能有点语法不对,尽力了哦.）

解题思路：成活率是指成活的棵数占总棵数的百分数，成活了100棵，一共100+5=105棵，然后根据公式：成活率=[成活树的棵数/植树的总棵数]×100%，列式解答即可．

[100/100+5]×100%≈95.2%
答：成活率是95.2%；
故答案为：×．

点评：
本题考点： 百分率应用题．

考点点评： 此题属于百分率问题，计算的结果最大值为100%，都是用一部分数量（或全部数量）除以全部数量乘以百分之百．

设男生X人
X*5/8+(120-X)*3/7=64
5X/8+360/7-3X/7=64
11X/56=88/7
X=64
男生64人,女生56人

1.下午卖了42张
2.882棵
3.甲2000,乙2500
4.500

一起=1÷（1/12+1/15+1/20）=5小时

不懂可追问,有帮助请采纳,谢谢!

设女生人数是x,则男生的是2x,列方程:(1×X+2X×4)÷X+2X最后等于3

男8女7

1,3月12日是初春,此时春雨蒙蒙而不至于洪涝,气温开始回升而又不至于过热,从水分和温度两方面的条件都很适宜,从而提高了成活率
2、原因是植被破坏.找两块面积1平米的草地,将其中一块草地的草拔光（或是找一块草地和一块裸露的土地）,用水冲刷,收集冲刷后的水,看看哪个土地的流出的水含泥土多.

植树节3.12复活节3.21母亲节5.10父亲节6.21教师节9.10中秋节8.15圣诞节12.25感恩节11.24

10

115,12和15的最小公倍数是60,又在100以上,就只有120
120-5=115.

快乐的植树节
今天是一年一度的植树节。我和妈妈买了几十棵沙枣树，在外公的那块地上种下。路上，天气阳光明媚，万里无云，就连小鸟也叽叽喳喳好像在为我歌唱呢！到了外公家，我们便和外公马不停蹄的到达山上的那块地。我们抬眼一看，啊！地上光秃秃的一片，一棵老树和几棵烧得只剩枝的树孤零零地在那里站着，向我们点头，好像在伤心地说：“小朋友，你们终于来了，我在这儿住了几十年，可没有一个伙伴和朋友，真孤独。”我心想：我们今天种上十几棵树，几年以后这里一定会变成一片美丽的树林。说干就干，外公看到我跃跃欲试的样子，便分了工：“爸爸负责拿着锄头挖树坑，妈妈负责栽树苗，外公铲土，外婆负责送树苗。”我纳闷了，于是我问外公：“我干什么？”外公笑着说：“你还小，你没力气。”我灵机一动可以浇水啊。我连忙对外公说：“我负责浇水。”外公听了，说：“这几天雨水充足不用浇水。”啊！我彻底懵了。爸爸看到我失望的样子，豪爽的说：“我的任务让给你。”但妈妈不同意，她说：“你力气小还是负责栽树苗吧。”我听了，高兴的跳起来。开始植树了。外公手脚利索的铲了一个树坑，我连忙把树根插进去，外公再用土把树根围起来，并用锄头的另一边敲了几下，我问外公为什么要这样，外公振振有词的说：“如果不这样的话，树就活不了。”外公语音刚落，妈妈那边又好了，我连忙跑到那边栽树。就这样来来回回，忙得不亦悦乎。
转眼间，几十棵树全部种完了。我对外公说：“因为星期1到星期5要读书，所以树苗拜托你了。外公答应了。我笑了

你好,同学,很高兴回答你的问题

正确答案如下；

March 12th is Tree-planting Day. On that day the Student Union will take students to plant trees on the West Mountain. We are going to get together at school gate at 7:00 a.m. Then we are going to take the school bus to get there. It will take us half an hour to get there by bus. We should be careful on the bus. We shouldn't play or fight on the bus. Every class should take some spades to dig holes and take some basins to carry water. I think it's really kind of us to plant trees.
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希望能帮到你,祝更上一层楼O(∩_∩)O
不明白请继续追问,可以详谈嘛(*^__^*)
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1979年2月，五届全国人大常委会第六次会议根据国务院的提议，通过了将3月12日定为我国植树节的决议，这项决议的意义在于动员全国各族人民积极植树造林，加快绿化祖国和各项林业建设的步伐．将孙中山先生与世长辞...

March 12th is Tree Planting Day.This year our school bought enough trees before that day .On that day ,we didn't had classes .The teachers and our classmates planted trees around our school.
We began to planted trees as soon as we got to school .some students dug the holes .Some students put the trees into the holes.
Some students put the earth back to the holes.Then we pushed the earth hard with our feet .At last we watered the trees as much as possible.
From then on we looked after the trees carefully and the trees grew very well .It made our shcool more beautiful .And How happy we are !

58×1.5-12 结果自己算吧

元旦节
春节
植树节
端午节
教师节
中秋节
国庆节

解题思路：设励东中学植树x棵，可知海石中学植树2x-3颗，根据题意列出方程，解出x的值，即可得出结果．

设励东中学植树x棵，
由题意得，x+（2x-3）=834，
解得：x=279，
则2x-3=2×279-3=555，
答：励东中学植树279棵，海石中学植树555棵．

点评：
本题考点： 一元一次方程的应用．

考点点评： 本题考查了一元一次方程的应用，解答本题的关键是读懂题意，设出未知数，表示出海石中学植树的数量，列方程求解．

解题思路：最外层点数=每边点数×4-4；实心方阵中总点数=每边点数×每边点数；代入数据即可解答．

10×4-4=36（棵），
10×10=100（棵），
答：最外层人数有36棵，整个方阵一共有100棵．

点评：
本题考点： 方阵问题．

考点点评： 此题考查了方阵问题中：最外层点数=每边点数×4-4；实心方阵中总点数=每边点数×每边点数的灵活应用．

B

1、设男生人数为2x,女生人数为x.
共种树：2x*4+x*1=9x
总人数：2x+x=3x
平均：9x/3x=3(棵）
2、增加的部分为三角形,底边是4,面积为36,则平行四边形及原梯形高为18.原梯形上底12,下低12+4=16,高为18,所以面积为（12+16）*18/2=252

2080÷﹙1+7/9)=1170
2080-1170=910
1170-910=260
植的柳树比杨树多260棵

设杨树X棵,柳树96-X棵
3X/4+3(96-X)/5=66
3X/4+57.6-3X/5=66
3X/20=8.4
X=56

56=7×8
91=7×13
最大公因数是7
所以分成7组
每组56÷7=8人
91÷7=13颗

植树节那个 学生为19, a=5,答案为26
因为学生数必须大于5,能被95公约的数有1*95和5*19,所以学生是19人
计算题你写得好乱 ,自己算吧

解题思路：（1）根据一班植树x棵，二班植树的棵数比一班的2倍少40棵得出二班植树（2x-40）棵，三班植树的棵数比二班的一半多30棵，得出三班植树=[1/2]（2x-40）+30=（x+10）棵，利用四班植树的棵数比三班的一半多30棵，得出四班植树=[1/2]（x+10）+30=（[1/2]x+35）棵，进而得出答案．
（2）将x=60代入求出各班植树棵树即可．

（1）∵一班植树x棵，
∴二班植树（2x-40）棵，
三班植树=[1/2]（2x-40）+30=（x+10）棵；四班植树=[1/2]（x+10）+30=（[1/2]x+35）棵，
四个班共植树：x+（2x-40）+（x+10）+（[1/2]x+35）=(
9
2x+5)棵；
（2）当x=60时，一班植树60棵，二班植树2x-40=80棵，三班植树x+10=70棵，四班植树[1/2]x+35=65棵．
所以二班植树最多．

点评：
本题考点： 列代数式；代数式求值．

考点点评： 本题主要考查了用字母列式表示数量关系及整式的化简和求值，分别表示出各班植树棵数是解题关键．

公历1月1日元旦、3月8日国际妇女节、3月12日植树节、5月1日国际劳动节、10月1日国庆节.

设男生栽x棵,则女生栽了（34-x）棵,根据题意,
得,5/12x=34-x
解之得 x=24
则34-x=10
所以男生栽了24棵,女生栽了10棵.