Question

2001乘[8分之1减2009分之1]加8乘[2001分之1减2009分之1]减2009乘[8分之1加2001分之1﹞加

Answer 1

2001*(1/8-1/2009)+8*(1/2001-1/2009)-2009*(1/8+1/2001)+8

=2001/8-2001/2009+8/2001-8/2009-2009/8-2009/2001+8

=2001/8-2009/8-2001/2009-8/2009-2009/2001+8/2001+8

=(2001-2009)/8-(2001+8)/2009-(2009-8)/2001+8

=-8/8-2009/2009-2001/2001+8

=-1-1-1+8

=5