2010-3/2-5/4-9/8-17/16-33/32-65/64-129/128-257/256
=2010-1-1/2-1-1/4-1-1/8-1-1/16-1-1/32-1-1/64-1-1/128-1-1/256
=2010-8-(1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256)
=2002-(1-1/256)
=2002-1+1/256
=2001又1/256
2010-3/2-5/4-9/8-17/16-33/32-65/64-129/128-257/256
=2010-1-1/2-1-1/4-1-1/8-1-1/16-1-1/32-1-1/64-1-1/128-1-1/256
=2010-8-(1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256)
=2002-(1-1/256)
=2002-1+1/256
=2001又1/256