9又3/4-15÷19-2/19*2(简算)

问题描述:

9又3/4-15÷19-2/19*2(简算)

9又3/4-15÷19-2/19*2
=9又3/4-15/19-4/19
=9又3/4-(15/19+4/19)
=9又3/4-1
=8又3/41/2001+2/2002+3/2003+4/2004+```+2001/2001简算