（|+3+5+7+···+2013）—（2+4+6+8···）=?

（|+3+5+7+···+2013）—（2+4+6+8···）=? （1+3+5+······2013）—（2+4+6······+2014）用简便方法哦,这是奥数题. 用简便方法计算（2+4+6+8······+2014）—（1+3+5+7······+2013） 1-3+5-7+9-11······+2009-2011+2013-2015 1 2 3 4 ·····7 ·······10 ········?1 3 5 7 ·····?······?··········290 1 4 9 ·····?······?··········? (2+4+6+8+······+100)—(1+3+5+7+······+99)等于几 （1994+1992+······+4+2）—（1+3+5+······+1991+1993）=（ ） （1+3+5++7+9······+2011）-（2+4+6+8······+2012）= 画出求1-3+5-7+······+2011-2013的值的程序框图 1,2,-3,-4,5,6,-7,-8······第2013个是什么 （9999+9997+···+9001）—（1+3+5+····+999）=? 计算1+(-2)+3+(-4)+5+(-6)+····+（+2013）+（-2014） 1+(-3)+(-5)+7+9+（-11）+（-13）+15+···+2009+（-2011）+（-2013）+2015 1+(-3)+(-5)+7+9+（-11）+（-13）+15+···+2009+（-2011）+（-2013）+2015 = (1+3+5+7+·····+99+101)—(2+4+6+8+····+98+100) 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 2[4/3y—（2/3y—1/2）]=3/4y急·································!1 计算1/（1*4）+1/（4*7）+1/（7*10)+------+1/(97*100)································································································