①100÷(-2)^2-(-2)÷(-1/2)
=100÷4-2×2
=25-4
=21
②(4/3+1/8-2.75)*(-24)+(-1)^2003-|-2|^3
=-24*4/3-24*1/8+24*11/4-1-8
=-32-3+66-9
=22
①100÷(-2)^2-(-2)÷(-1/2)
=100÷4-2×2
=25-4
=21
②(4/3+1/8-2.75)*(-24)+(-1)^2003-|-2|^3
=-24*4/3-24*1/8+24*11/4-1-8
=-32-3+66-9
=22