1994又1/2×79+6/25×790+244.9最后等于158000

1994又1/2×79+6/25×790+244.9最后等于158000
1994又1/2×79+6/25×790+244.9
最后等于158000

1994又1/2×79+6/25×790+244.9最后等于158000
(1994 1/2+5 1/2)*79+244.9
=2000*79+244.9
=158000+244.9
=158244.9

1999又1/2*79+6/25*790+244.9
=19995*7.9+24*7.9+31*7.9
=7.9*(19995+24+31)
=7.9*20050
=80*2005-2005
=161995

1999又1/2*79+6/25*790+244.9
=19945*7.9+24*7.9+31*7.9
=7.9*(19945+24+31)
=7.9*20000
=158000