(|+3+5+7+···+2013)—(2+4+6+8···)=?

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(|+3+5+7+···+2013)—(2+4+6+8···)=?
(|+3+5+7+···+2013)—(2+4+6+8···)=?

(|+3+5+7+···+2013)—(2+4+6+8···)=?
(1+3+5+7+······+2013)-(2+4+6+8+····+2012)
=1+(3-2)+(5-4)+······+(2013-2012)
=1+1+······+1
=1007
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(|+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)································································································