11+192+1993+19994+……+1999999999=19-8+199-7+1999-6+19999-5+199999-4+1999999-3+19999999-2+199999999-1+1999999999=(19+199+1999+19999+199999+1999999+19999999+199999999+1999999999)-(8+7+6+5+4+3+2+1)=2222...