3 a

来源：学生作业帮编辑：大师作文网作业帮分类：英语作业时间：2024/11/06 13:41:28

解题思路：考查形容词和副词的原级，比较级，最高级的用法差异。bad-worse-worst
解题过程：
1.worst
2.good., the best
3.more expensive, the most expensive
4.worst , most comfortably
5.best better , most interesting

合并同类项3a*3a+a*a-(2a*2a)+(3a-a*a) (a 1)(a 2)(a 3)(a a+a^2+a^3+a^4 U3,A.3a 计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8 (a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)= (a+3a+ 5a+```+2007a)-(2a+4a+6a+```+2008a)=? (a+3a+5a+...+2013a)-(2a+4a+6a+...+2012a)= 计算(a+3a+5a+.+2003a)-(2a+4a+6a+...+2004a) (a+3a+5a+.+2003a)-(2a+4a+6a+.+2004a) 化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a. a(a-1)(a-2)(a-3)(a-4)因式分解