（1+3+5+······2013）—（2+4+6······+2014）用简便方法哦,这是奥数题.

（1+3+5+······2013）—（2+4+6······+2014）用简便方法哦,这是奥数题. 1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········? （1994+1992+······+4+2）—（1+3+5+······+1991+1993）=（ ） 2[4/3y—（2/3y—1/2）]=3/4y急·································!1 用简便方法计算（2+4+6+8······+2014）—（1+3+5+7······+2013） 计算1/（1*4）+1/（4*7）+1/（7*10)+------+1/(97*100)································································································ （|+3+5+7+···+2013）—（2+4+6+8···）=? （9999+9997+···+9001）—（1+3+5+····+999）=? 1-3+5-7+9-11······+2009-2011+2013-2015 1+2+3+4+5+6· · · · · ·+2013等于多少 秦始皇和汉武帝各自的功劳是?（用1·······2·······3··········来说） (2+4+6+8+······+100)—(1+3+5+7+······+99)等于几 急·····················1+2+3+...+999=? 变态数学题·······方程一道············x+2y+3z=1x=y+12x+3y+5z=2方程组············要过程············我解了之后总觉得无解····· 俗语和名句的填空1······,自知之明.2······,行必果.3工欲善其事,······.4临渊羡鱼,······.5非学无以广才,······.6······,福兮祸之所伏.7项庄舞剑,······.8······,人以群 找规律：1,1,2,3,5,8,——,21,34,——················ （1+3+5++7+9······+2011）-（2+4+6+8······+2012）= 计算1+(-2)+3+(-4)+5+(-6)+····+（+2013）+（-2014）