Question

2001*(1/8-9/2009)+8*(1/2001-1/2009)-2009*(1/8+1/2001)+8

Answer 1

你的题抄错了,应该是：

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

=2001×1/8 -2001*1/2009+8*1/2001-8*1/2009-2009*1/8-2009*1/2001+8

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

=-1-1-1+8=5