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官扶泊4568给几题或以上6年级超难的数学题 -
曾政裘19787597845 ______ 列方程解应用题 等量关系 具体问题具体分析 例3:一列火车以每小时90千米的速度从甲站开往乙站,同时有一列货车以每小时75千米的速度从乙站开往甲站,经过4小时相遇,甲乙两站的铁路长多少千米? 1、甲乙两人年龄的和为29岁,已知甲...

官扶泊4568一道较难的六年级复习数学题1.甲.乙两袋共有26个小球,如果从甲袋取出三分之一,从乙袋取出七分之三,则两袋剩下的球一样多,两个袋子中原来个有多少... -
曾政裘19787597845 ______[答案] 1.设甲袋中原来有x个球,乙袋中有y个球 2.(列方程)x+y=26 (1-1/3)x=(1-3/7)y 3.x=12 y=14 4.答:甲袋中原来有12个球,乙袋中有14个球 具体步骤应该就这些,希望对你有用

官扶泊4568六年级的超难数学题
曾政裘19787597845 ______ 原来材料费X,工资(25000-X)元 (1-20%)x+(1+10%)(25000-x)=21500 x=20000 原来材料费2000,工资(25000-X)=5000元 有三种情况 第一种情况是 设买甲X台,乙Y台,则 1500X+2100Y=90000 X+Y=50 解得X=25,Y=25. 可获利 ...

官扶泊4568小学6年级数学题,超难 -
曾政裘19787597845 ______ 第一次相遇,两人共行了1个全程,甲行了1个90千米 第二次相遇,两人共行了3个全程,甲行了3个90千米 同时,甲行的还是2个全程少50千米 AB两地相距 (90*3+50)÷2=160千米

官扶泊4568求六年级最难的数学应用题!!!! -
曾政裘19787597845 ______ 504乘以自然数A,得到一个平方数(某自然数的平方),求A的最小值和这个平方数. (请写出计算过程,禁止使用方程) 育英小学四、五、六共有615人,其中,六年级人数的的1\2【二分之一】是五年级人数的2\5【五分之二】,又是四年级...

官扶泊4568六年级超难数学题
曾政裘19787597845 ______ 3^2-2^2=9-4=5=(3+2)*(3-2)=3+2 5^2-4^2=25-16=9=(5+4)*(5-4)=4+5 同理 2005^2-2004^2=(2005+2004)*(2005-2004)=4009=2004+2005 所以,原式=1+2+3+4+···+2004+2005(然后应该知道算法了吧) =(1+2005)*2005/2 =2011015

官扶泊4568小学六年级超难数学题
曾政裘19787597845 ______ 因为,AD;DB=4;5 S△abc=90平方厘米 所以S△甲=40平方厘米 S△BDC=50平方厘米 CE=ED,所以S△乙=S△丙=1/2 S△BDC=25 平方厘米 有不明白的地方请追问. 谢谢采纳.

官扶泊4568超难的六年级数学题
曾政裘19787597845 ______ 解 设含盐6.4%的盐水为X克 0.064/X=0.05/130+0.09/(X-130) 解出X=181.55克 (通过验算正确)

官扶泊4568小学六年级数学题(超难) -
曾政裘19787597845 ______ 一列快车从甲地匀速驶往乙地,一列慢车从乙地匀速驾驶往甲地,两车同时出发,设慢车的行驶时间为X(h),两车之间的距离为Y(km),图中的折线表示Y与X之间的关系,根据图像进行一下研究:1.甲、乙两地之间的距离为( 880 )km.2.请解释图中点B的实际意义.点B表示快车和慢车4小时的相遇地点3.求慢车的速度.880÷11=80(千米/小时)4.求快车的速度. 880÷4-80=140(千米/小时)

官扶泊4568六年级超难数学题,非高手请勿入内! -
曾政裘19787597845 ______ 首先要看下你这个题,参加语文竞赛的可以分为仅参加语文、参加语文和数学、参加语文和英语、参加语文数学及英语;题中说参加语文和数学的有10人,参加语文和英语的有14人,两者相加就等于24与题中的22人参加语文竞赛矛盾,所以我觉得你可以检查下这个题是不是有不大合理了!