999…9(1988个9)*999…9(1988个9)+1999…9(1988个9)=?_数学解答

999…9(1988个9)*999…9(1988个9)+1999…9(1988个9)=?

人气：443 ℃　时间：2020-04-22 17:32:21

解答

=[1000...000(1988个0)-1]*[1000...000(1988个0)-1]+[2000...000(1988个0)-1]=1000...000(3976个0)-2*[1000...000(1988个0)-1]+1+2*[1000...000(1988个0)]-1=1000...000(3976个0)