-1²×(-3)²-(-½)2003次方×(-2)2002次方÷2/9
=-1×9-(-½)×(-½)2002次方×(-2)2002次方÷2/9
=-9+½×[-½×(-2)]2002次方×9/2
=-9+½×1×9/2
=-9+9/4
=-27/4
-1²×(-3)²-(-½)2003次方×(-2)2002次方÷2/9
=-1×9-(-½)×(-½)2002次方×(-2)2002次方÷2/9
=-9+½×[-½×(-2)]2002次方×9/2
=-9+½×1×9/2
=-9+9/4
=-27/4