(1+2+3+…+2007+2008+2007+…+3+2+1)÷2008=______.
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/24 14:17:18
(1+2+3+…+2007+2008+2007+…+3+2+1)÷2008=______.
![(1+2+3+…+2007+2008+2007+…+3+2+1)÷2008=______.](/uploads/image/z/99243-27-3.jpg?t=%EF%BC%881%2B2%2B3%2B%E2%80%A6%2B2007%2B2008%2B2007%2B%E2%80%A6%2B3%2B2%2B1%EF%BC%89%C3%B72008%3D______%EF%BC%8E)
(1+2+3+…+2007+2008+2007+…+3+2+1)÷2008
=2008×2008÷2008
=2008.
故答案为:2008.
=2008×2008÷2008
=2008.
故答案为:2008.
(1+2+3+…+2007+2008+2007+…+3+2+1)÷2008=______.
2009-2008+2007-2006+2005-2004+…+3-2+1=______.
科学探究的基本方法:1、______,2、______,3、______,4、______.
(1)34.37°=______度______分______秒. (2)3
1+2+3+4+5…+2007+2008的和是______(奇数或偶数).
找规律填数:1,3,2,6,4,______,______,12,16,….
1×2+2×3+…+100×101=______.
-1-2-3-4-…-100=______.
按律填数.(1分) 1,3,2,6,4,______,______,12,16,…
细胞核的结构(1)_____(2)染色质______(3)核仁______(4)核孔______细胞核的功能______
找规律:1,1,2,3,5,8,13,21,34,55,______,______,______……
找规律填数:(1)0,1,2,3,______,______.(2)1,1,2,3,______,______.(3)1