当前位置: > 数学计算题,...
题目
数学计算题,
(1+3+5+ ``` +1999+2000+2001)-(2+4+6+```+1998+2002)
99`````````9 Ⅹ 99`````````9+1999```````9
(2000个9) (2000个9) (2000个9)

提问时间:2020-10-14

答案
(1+3+5+ ``` +1999+2000+2001)-(2+4+6+```+1998+2002)
=(1-2)+(3-4)+(5-6)+```+(2001-2002)
=-1*2002/2
=-1001
99`````````9 Ⅹ 99`````````9+1999```````9
(2000个9) (2000个9) (2000个9)
=(10`````````0-1) Ⅹ 99`````````9+1999```````9
(2000个0) (2000个9) (2000个9)
=99`````````900`````````0-
(2000个9) (2000个0)
99`````````9+199`````````9
(2000个9) (2000个9)
=99`````````900`````````0+100`````````0
(2000个9) (2000个0) (2000个0)
=10000``````````````````00
(4000个0)
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
1,人们染上烟瘾,最终因吸烟使自己丧命.
版权所有 CopyRight © 2012-2019 超级试练试题库 All Rights Reserved.