解
|3/4-1/2|-(1/2+1/4)
=3/4-1/2-1/2-1/4
=(3/4-1/4)-(1/2+1/2)
=1/2-1
=-1/2
-2^4÷(-2)-2/3×(-1又1/2)-(-2009)
=-16÷(-2)-2/3×(-3/2)+2009
=8+1+2009
=2018