{"imgList":[],"Brie":"小学奥数知识2-3-3 列不定方程解应用题.学生版。不定方程是数论中最古老的分支之一.古希腊的丢番图早在公元世纪就开始研究...","SN":"7","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【巩固】王师傅驾车从甲地开往乙地交货.如果他往返都以每小时60千米的速度行驶,正好可以按时返回甲地.可是,当到达乙地时,他...","SN":"7","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例 28】甲、乙两车分别从、两地出发,同向而行,乙车在前,甲车在后.已知甲车比乙车提前出发小时,甲车的速度是千米\/小...","SN":"5","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例 3】 甲、乙两车的速度分别为 52 千米/时和 40 千米/时,它们同时从 A 地出发到 B 地去,出发后 6 时,甲车遇到一...","SN":"10","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例 10】甲、乙两车分别从A,B两地出发,并在A,B两地间不断往返行驶。【例 17】 A,B两地间有条公路,甲从A地出发步行到B...","SN":"11","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学奥数知识1-3-6 公式运用.学生版。【例 1】【例 2】 计算:【例 3】 计算:【例 4】 计算:【例 5】 计算: ...","SN":"8","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【巩固】1个苹果和1个香蕉的重量是7个小铁块的重量,而1个苹果的重量是4个小铁块的重量,1个香蕉的重量是多少个小铁块的重...","SN":"16","RN":"0","istop":"0"}
{"imgList":[],"Brie":"1、认识了解方程及方程命名。4、方程命名:未知数的个数代表元,未知数的次数:n元a次方程就是含有n个未知数,且含未知数项...","SN":"10","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学奥数知识1-2-2-1 分数裂项.学生版。(1)对于分母可以写作两个因数乘积的分数,即形式的,这里我们把较小的数写在前面,...","SN":"4","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例 8】 在中选出若干个数使它们的和大于3,最少要选多少个数?【例 15】 从六个数中选出三个数,分别记为A,B,C.要求选...","SN":"9","RN":"0","istop":"0"}
{"imgList":[],"Brie":"已知某块草地上的草可供20头牛吃5天或可供15头牛吃6天。设1头牛1天吃的草为1份,20头牛5天吃100份,15头牛6天吃90份,100-9...","SN":"23","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第40讲 不定方程。当方程的个数比方程中未知数的个数少时,我们就称这样的方程为不定方程。解不定方程...","SN":"13","RN":"0","istop":"0"}
{"imgList":[],"Brie":"二、要注意添括号或者去括号对运算符号的影响。⑴在“”号后面添括号或者去括号,括号内的“”、“”号。⑵在“”号后面添...","SN":"10","RN":"0","istop":"0"}
{"imgList":[],"Brie":"在加减法混合运算中,去括号时:如果括号前面是“+”号,那么去掉括号后,括号内的数的运算符号不变;如果括号前面是“-...","SN":"9","RN":"0","istop":"0"}
{"imgList":[],"Brie":"而船顺水航行时,其形式的速度为船在静水中的速度加上水流速度,而船在怒水航行时的行驶速度是船在静水中的速度与水流速度...","SN":"12","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第37讲 对策问题。【例题1】两个人做一个移火柴的游戏,比赛的规则是:两人从一堆火柴中可轮流移走1至7...","SN":"13","RN":"0","istop":"0"}
{"imgList":[],"Brie":"比如:32除以5余数是2,19除以5余数是4,两个余数的和是2+4=6。“32+19”除以5的余数就恰好等于它们的余数和6除以5的余数。...","SN":"14","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第29讲 抽屉原理(一)把天数看做抽屉,共366个抽屉。把四种不同的颜色看成是4个抽屉,把手套看成是元...","SN":"6","RN":"0","istop":"0"}
{"imgList":[],"Brie":"在抽屉原理的第(2)条原则中,抽屉中的元素个数随着元素总数的增加而增加,当元素总数达到抽屉数的若干倍后,可用抽屉数除...","SN":"6","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第31讲 逻辑推理(一)①张不在甲厂,②王不在乙厂,③在甲厂的不是钳工,④在乙厂的是车工,⑤王不是...","SN":"13","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第32讲 逻辑推理(二)解数学题,从已知条件到未知的结果需要推理,也需要计算,通常是计算与推理交替...","SN":"14","RN":"0","istop":"0"}
{"imgList":[{"img":"http:\/\/thumbnail1.360doc.com\/DownloadImg\/2023\/01\/0305\/U8\/1062407336_1.jpg"}],"Brie":"追及距离=速度差×时间。甲车比乙车早到8分钟,当甲车到达时,乙车还距工地24千米。甲、乙两人从同时同向出发到相遇,6分钟...","SN":"15","RN":"0","istop":"0"}
{"imgList":[],"Brie":"在行程问题中,与环行有关的行程问题的解决方法与一般的行程问题的方法类似,但有两点值得注意:一是两人同地背向运动,从...","SN":"7","RN":"0","istop":"0"}
{"imgList":[],"Brie":"已知凉拌学生步行的速度相同,汽车的速度是步行的7倍,汽车应在距机场多少千米处返回接乙班同学,才能使两班同学同时到达机...","SN":"18","RN":"0","istop":"0"}
{"imgList":[],"Brie":"分数与小数混合运算的技巧。在分数、小数的四则混合运算中,到底是把分数化成小数,还是把小数化成分数,这不仅影响到运算...","SN":"19","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学奥数知识1-1-2-3 分数四则混合运算综合.学生版。在分数、小数的四则混合运算中,到底是把分数化成小数,还是把小数化成...","SN":"4","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【巩固】 把210拆成7个自然数的和,使这7个数从小到大排成一行后,相邻两个数的差都是5,那么,第1个数与第6个数...","SN":"10","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学奥数知识1-2-1-2 等差数列计算题.学生版。① 通项公式:递增数列:末项首项(项数)公差,递减数列:末项首项(项数)公差...","SN":"9","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例 19】 若干个同样的盒子排成一排,小明把50多个同样的棋子分装在盒中,其中只有一个盒子没有装棋子,然后他外出了,小...","SN":"9","RN":"0","istop":"0"}
{"imgList":[],"Brie":"求图中阴影部分的面积。1、如图所示,图形中正方形的面积是50平方厘米,分别求出每个图形中阴影部分的面积。2、如图所示,...","SN":"15","RN":"0","istop":"0"}
{"imgList":[],"Brie":"解法一:因为分数的分子与分母加上了一个数,所以分数的分子与分母的差不变,仍是18,所以,原题转化成了一各简单的分数问...","SN":"14","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题2】有两个同样的仓库A和B,搬运一个仓库里的货物,甲需要10小时,乙需要12小时,丙需要15小时。有两个同样的仓库A和B...","SN":"15","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题1】一项工程,甲单独做需要12小时,乙单独做需要18小时。若甲做1小时后乙接替甲做1小时,再由甲接替乙做1小时……甲...","SN":"15","RN":"0","istop":"0"}
{"imgList":[],"Brie":"比较大小时,如果要比较的分数都接近1时,可先用1减去原分数,再根据被减数相等(都是1),减数越小,差越大的道理判断原分...","SN":"5","RN":"0","istop":"0"}
{"imgList":[],"Brie":"2、如果两个三位数的和是525,就说这两个三位数组成一个数对。【例题4】三个连续自然数,后面两个数的积与前面两个数的积之...","SN":"5","RN":"0","istop":"0"}
{"imgList":[],"Brie":"百位上不能取0,故有3种不同的取法:十位上有4种取法,个位上也有4种取法,由乘法原理共可组成3×4×4=48个不相等的三位数...","SN":"8","RN":"0","istop":"0"}
{"imgList":[],"Brie":"2、把一个长为12分米,宽为6分米,高为9分米的长方体木块锯成两个想同的小厂房体木块,这两个小长方体的表面积之和,比原来...","SN":"8","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第28讲 表面积与体积(二)中、小水池升高部分是一个长方体,它的体积就等同于碎石的体积。3、将表面积...","SN":"12","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第9讲 设数法解题。2、某班男生人数是女生的,女生的平均身高比男生高15%,全班的平均身高是130厘米,...","SN":"12","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题2】彩色电视机和黑白电视机共250台。【例题3】师傅与徒弟两人共加工零件105个,已知师傅加工零件个数的与徒弟加工零...","SN":"11","RN":"0","istop":"0"}
{"imgList":[],"Brie":"运出到甲仓库,这时甲、乙两仓库的粮食储量相等。1、甲、乙两个仓库各有粮食若干吨,从甲仓库运出到乙仓库后,又从乙仓库运...","SN":"11","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题1】某车间生产甲、乙两种零件,生产的甲种零件比乙种零件多12个,乙种零件全部合格,甲种零件只有合格,两种零件合格...","SN":"11","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第14讲 比的应用(一)【例题2】光明小学将五年级的140名学生,分成三个小组进行植树活动,已知第一小...","SN":"13","RN":"0","istop":"0"}
{"imgList":[],"Brie":"2、加工某种零件要三道工序,专做第一、二、三道工序的工人每小时分别能完成零件48个,32个,28个,现有118名工人,要使每...","SN":"11","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题1】一项工程,甲、乙两队合作15天完成,若甲队做5天,乙队做3天,只能完成工程的,乙队单独完成全部工程需要几天?如...","SN":"9","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题1】已知如图,三角形ABC的面积为8平方厘米,AE=ED,BD=2\/3BC,求阴影部分的面积。1、如图所示,长方形ABCD的面积是2...","SN":"14","RN":"0","istop":"0"}
{"imgList":[],"Brie":"小学数学六年级奥数 第19讲 面积计算(二)【例题1】求图中阴影部分的面积(单位:厘米)。【例题2】求图中阴影部分的面积...","SN":"10","RN":"0","istop":"0"}
{"imgList":[],"Brie":"1、甲书架上的书比乙书架上的3倍多50本,若甲、乙两个书架上各增加150本,则甲书架上的书是乙书架上的2倍,甲、乙两个书架...","SN":"13","RN":"0","istop":"0"}
{"imgList":[],"Brie":"","SN":"4","RN":"0","istop":"0"}
{"imgList":[],"Brie":"","SN":"12","RN":"0","istop":"0"}
{"imgList":[{"img":"http:\/\/thumbnail1.360doc.com\/DownloadImg\/2023\/01\/2010\/i109\/1064291300_1.jpg"}],"Brie":"帮助学习有机化学的几款手机app.学习有机化学你的手机里还没有这几款app那就out了!②Organic Chemistry challenge:一款可...","SN":"6","RN":"0","istop":"0"}
{"imgList":[],"Brie":"[先回顾前述知识点关于共振的内容:对于共轭体系的分子来说,当一个分子、离子或自由基按价键规则无法用经典结构式圆满表达...","SN":"5","RN":"0","istop":"0"}
{"imgList":[],"Brie":"9.30【分析】根据题意,一个长方体可以切成 5个小正方体,由此可知,这个长方体的底面是正方形,长方体的长是宽(高)的5...","SN":"4","RN":"0","istop":"0"}
{"imgList":[],"Brie":"30.密度与温度:温度能改变物体的密度,一般物体都是在温度升高时体积膨胀,密度变小,即热胀冷缩。液体压强的特点:注意:...","SN":"7","RN":"0","istop":"0"}
{"imgList":[],"Brie":"初中物理全部考点归纳。(一)、光现象(5个考点)(一)、电路、电流、电压和电阻(7个考点)正确使用电流表测量串联电路...","SN":"24","RN":"0","istop":"0"}
{"imgList":[{"img":"http:\/\/thumbnail1.360doc.com\/DownloadImg\/2023\/01\/2012\/i109\/1064259213_1.jpg"}],"Brie":"学习15|“基于教材单元,设计学习任务群”的问题及应对。徐颖老师结合区里正在进行“基于教材单元,设计学习任务群”的工作...","SN":"6","RN":"0","istop":"0"}
{"imgList":[],"Brie":"马丁.路德金的十五句名言,句句经得起时间的考验!每年一月的第三个星期一是美国的\"马丁·路德·金纪念日\"英文叫:?\"马丁·...","SN":"5","RN":"0","istop":"0"}
{"imgList":[{"img":"http:\/\/thumbnail1.360doc.com\/DownloadImg\/2023\/01\/1907\/i109\/1064229709_1.jpg"},{"img":"http:\/\/thumbnail1.360doc.com\/DownloadImg\/2023\/01\/1907\/i109\/1064229709_2.jpg"},{"img":"http:\/\/thumbnail1.360doc.com\/DownloadImg\/2023\/01\/1907\/i109\/1064229709_3.jpg"}],"Brie":"一张外卖员和211硕士工资对比图,揭开“鸡娃”的痛:抱歉,高学历可不等于高收入。而外卖小哥的视频下面,有一名211硕士这...","SN":"26","RN":"0","istop":"0"}
{"imgList":[],"Brie":"【例题2】红、黄、蓝气球共有62只,其中红气球的等于黄气球的,蓝气球有24只,红气球和黄气球各有多少只?【例题3】已知甲...","SN":"14","RN":"0","istop":"0"}
{"imgList":[],"Brie":"乙筐是甲筐的,从甲筐取出5千克梨放入乙筐后,乙筐的梨是甲筐的7\/9。1、阅览室看书的同学中,女同学占,从阅览室走出5位女...","SN":"13","RN":"0","istop":"0"}