(1)5.674×37.5+375×0.4326
=5.674×37.5+(375÷10)*(0.4326*10)
=5.674×37.5+37.5*4.326
=37.5*(5.674+4.326)
=37.5*10
=375.
(2)20052005÷20042004
=2005*10001/2004*10001
=2005/2004
(8)1992×20052005-2005×19921992
=1992*2005*10001-2005*1992*10001
=0
(9)38×999
=38*(1000-1)
=38*1000-38
=……
(10)578*1001
=578*(1000+1)
=578*1000+578
=……
(6)不晓得