Question

简算：1993加1992乘1994 分之1993乘1994减1

Answer 1

1993+1992*(1993/1994)*1994-1
=1993+1992*1993-1
=1993(1992+1)-1
=1993^2-1
=(1993+1)(1993-1)
=1994*1992
=3972048