999.9*999.9+1999.9 (2005个9) (2005个9) (2005个9)
问题描述:
999.9*999.9+1999.9 (2005个9) (2005个9) (2005个9)
答
999.9*999.9+1999.9 (2005个9) (2005个9) (2005个9)=999.9*999.9(2005个9) (2005个9)+999.9(2005个9) +10……0(2005个0)=999……900……0(2005个9)(2005个〇)+10……0(2005个0)=10……0(4010个0)...