(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算
(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算
(1+3+5+··+2001+2003)-(2+4+6+··+2000+2002)
数学计算.(1乘2+2乘3+3乘4+4乘5+·····+2003乘2004=?)
1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)······(2003÷2004)=?
计算(+1)+(-2)+(+3)+(-4)+······+(-100)+(+101)+(-102)
计算:-1+2+(-3)+4+(-5)+······+(-99)+100等于多少?
1、(1+3+5+···+2009+2011)-(2+4+6+···+2010+2012)
计算1+(-2)+3+(-4)+5+(-6)+····+(+2013)+(-2014)
计算:(1-2)*(2-3)*(3-4)*······*(100-101)
(1+3+5+···+997+999)—(2+4+6+···+998+1000)
1-2+3-4+5-6+7······-2002+2003 简便计算(用递等式)
数学计算.(1乘2+2乘3+3乘4+4乘5+·····+2004乘2005=?)