2002除2001/2003 99乘99/100巧算

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2002除2001/200399乘99/100巧算2002除2001/200399乘99/100巧算2002除2001/200399乘99/100巧算2002除2001/2003=(2001+1)*2

2002除2001/2003 99乘99/100巧算
2002除2001/2003 99乘99/100
巧算

2002除2001/2003 99乘99/100巧算
2002除2001/2003
=(2001+1)*2003/2001
=1+2003/2001
=1+(2001+2)/2001
=4004/2001
99乘99/100
=99*(1-1/100)