1\/2+3\/3+6\/4+10\/5+15\/6+21\/7+28\/8+36\/9通分为多少?
1\/2+3\/3+6\/4+10\/5+15\/6+21\/7+28\/8+36\/9 =1\/2+1+3\/2+2+5\/2+3+7\/2+4 =8×(1\/2+4)\/2 =18.
1\/2+1\/3+1\/4+1\/5+1\/6+1\/7+1\/8+1\/9=?有简洁的做法么?
1\/2+3+4+5+6+7+8+9=1\/44.^_^
1+2+3+4+5+6+7+8+9+10怎样简便运算
=1+(1\/2+1\/3+1\/6)+(1\/4+1\/5+1\/10)+1\/7+1\/8+1\/9 =1+1+11\/20+1\/8+1\/7+1\/9 =1+1+27\/40+1\/9+1\/7 =1+1+283\/360+1\/7 =1+1+2341\/2520 =1+4861\/2520 ≈2.92896
1\/2+3\/4+73\/64简便计算过程
1\/2+3\/4+7\/8+15\/16+31\/32+63\/64=5又1\/64。简便计算过程如下:1\/2+3\/4+7\/8+15\/16+31\/32+63\/64 = 1-1\/2+1-1\/4+1-1\/8+1-1\/16+1-1\/32+1-1\/64 = 6-(1\/2+1\/4+...+1\/64)= 6-63\/64 =5又1\/64
1\/2+3\/4+7\/8+15\/16+31\/32+63\/64这道题目用简便方法怎么做啊急啊_百度...
1\/2+3\/4+7\/8+15\/16+31\/32+63\/64 =(1-1\/4)+(1-1\/8)+(1\/1\/16)+(1-1\/32)+(1\/1\/64)=6-(1\/2+1\/4+1\/8+1\/16+1\/32+1\/64)=6-(1\/2×2-1\/64)=6-1+1\/64 =5又1\/64
1+3\/2+5+4+7\/8+9\/16+11\/32+13\/64+15\/128+17\/256的答案是多少?
先通分:1+384\/256+5+4+224\/256+144\/256+88\/246+52\/246+30\/246+17\/256 =10+939\/256=3499\/256 不知道可以约分不
...一+4分之一+5分之二+7分之五+8分之七+20分之九+21分之十+24分之十 ...
这是考察通分和分配率的知识的:(1\/3+5\/7+10\/21)+(1\/4+2\/5+9\/20)+(7\/8+11\/24)+12\/35 =32\/21+11\/10+4\/3+12\/35 =(32\/21+4\/3)+(11\/10+12\/35)=30\/7+101\/70 =401\/70 希望能够帮到你!
1\/2+3\/4+7\/8+15\/16+31\/32+63\/64=? 简便方法!
1\/2+3\/4+7\/8+15\/16+31\/32+63\/64=? 的简便方法如下:1\/2+3\/4+7\/8+15\/16+31\/32+63\/64= =1-1\/2+1-1\/4+1-1\/8+1-1\/16+1-1\/32+1-1\/64 =6-(1\/2+1\/4+1\/8+1\/16+1\/32+1\/64)=6-63\/64 =5又1\/64
1\/2+5\/3+1\/3咋通分?
这几个分数的分母是2和3,因此通分就要找他们的最小公倍数是6,所以通分以后是:3\/6+10\/6+2\/6 =15\/6 =5\/2
1\/2+3\/4+6\/5+8\/7+...+200\/199等于多少要算式
=5.1873775176396203629343946861154 {逐个通分,相加,约分} 然后再加上99个1.等于 335266167227140350\/3217915406022937 =104.18737751763962036293439468612 1+1\/2+1\/3+...+1\/n这个是发散数列,也就是说要多大可以有多大 没有简便算法 最后答案请自己按计算器吧,这里实在是算得很辛苦了 ...