1+2+3+4+5……+2009+2010等于多少?1+(-2)+3+(-4)+……+2009+(-2010)= 太简便了我看不懂
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/30 00:26:46
![1+2+3+4+5……+2009+2010等于多少?1+(-2)+3+(-4)+……+2009+(-2010)= 太简便了我看不懂](/uploads/image/z/1025851-67-1.jpg?t=1%2B2%2B3%2B4%2B5%E2%80%A6%E2%80%A6%2B2009%2B2010%E7%AD%89%E4%BA%8E%E5%A4%9A%E5%B0%91%3F1%2B%EF%BC%88-2%EF%BC%89%2B3%2B%28-4%29%2B%E2%80%A6%E2%80%A6%2B2009%2B%EF%BC%88-2010%EF%BC%89%3D+%E5%A4%AA%E7%AE%80%E4%BE%BF%E4%BA%86%E6%88%91%E7%9C%8B%E4%B8%8D%E6%87%82)
x)36666},Ov=]2醉t Tk,Uxdu
OYs}dTOGljjC;<8,cnh``
hj"@|*2#Ch@jj)سO[7> u-Ȧwn~7~^C@
cTY
1+2+3+4+5……+2009+2010等于多少?1+(-2)+3+(-4)+……+2009+(-2010)= 太简便了我看不懂
1+2+3+4+5……+2009+2010等于多少?1+(-2)+3+(-4)+……+2009+(-2010)= 太简便了我看不懂
1+2+3+4+5……+2009+2010等于多少?1+(-2)+3+(-4)+……+2009+(-2010)= 太简便了我看不懂
1+2+3+4+5……+2009+2010等于
(1+2010)×2010÷2
=2011×1005
=2011×(1000+5)
=2011000+10055
=2021055
1+(-2)+3+(-4)+……+2009+(-2010)
=-1+(-1)+.+(-1)
总共有2010÷2=1005对-1
即原式=-1005