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值此2003年新年来临之际,特编一组与2003有关的新年趣题,供同学们演练。1.计算:(1~2+3~2+5~2+…+2001~2+2003~2)-(2~2+4~2+…+2002~2)
On the occasion of the 2003 New Year, a group of new year-related questions related to 2003 was specially arranged for the students to practice. 1. Calculation: (1~2+3~2+5~2+...+2001~2+2003~2)-(2~2+4~2+...+2002~2)