1.－3－[－5＋（1－0.2×3/5）÷（－2）]2.－9²＋2×（－3）²＋（－6）÷（－2/3）3.－1四次方－（1－0.5）×1/3×[2－(－3)²]4.（－3）²－（1又1/2）×2/9－6÷|－2/3|5.32×（－2/3）＋（－11）×（－2/3）－21×（－2/3）6.－3/4×[－3²×（－2/3）²－2]7.－2²＋（－2）³×5－（－0.28）÷（－2）²8.－（－1）四次方－（1－1/2）÷（＋3）×[2－（－3）²]

1.
=-3-[-5+(1-0.12)÷（－2）]
=-3-[-5+0.88÷（－2）]
=-3-(-5-0.44)
=-3-(-5.44)
=-3+5.44
=2.44
2.
=-81＋2×9＋6×3/2
=-81+18+9
=-54
3.
=－1－0.5×1/3×[2－9]
=－1－1/2×1/3×(-7)
=-1+7/6
=1/6
4.
=9－（3/2）×2/9+6×3/2
=9-1/3+9
=17又2/3
5.
=-64/3＋22/3+42/3）
=0
6.
=－3/4×(－9×4/9－2)
=-3/4×(－4－2)
=-3/4×(-6)
=9/2
7.
=-4-8×5+0.28÷4
=-4-40+0.07
=-43.93
8.
=－1－1/2÷3×[2－9]
=-1-1/2÷3×(-7)
=-1+7/6
=1/6

1.=-3-[-5+(1-0.12)÷(-2)]=-3-[-5+0.78÷(-2)]=-3-[-5-0.39]=2+0.39=2.39;
2.=-81+2×9+6÷2/3=-81+18+9=-54;
3.=1-1/2×1/3×(-7)=1+7/6=13/6;
4.=9-3/2×2/9+6×3/2=9-1/3+9=17又2/3;
5.=-64/3+22/3+42/3=0/3=0;
6.=-3/4×[-9×4/9-2]=-3/4×(-6)=9/2;
7.=-4+(-40)+0.28÷4=-44+0.07=-43.93;
8.=-1-1/2÷3×[2-9]=-1-1/6×(-7)=-1+7/6=1/6.

题目不吵了哈!
1.=-3-[-5+(1-0.12)÷(-2)]=-3-[-5+0.78÷(-2)]=-3-[-5-0.39]=2+0.39=2.39;
2.=-81+2×9+6÷2/3=-81+18+9=-54;
3.=1-1/2×1/3×(-7)=1+7/6=13/6;
4.=9-3/2×2/9+6×3/2=9-1/3+9=17又2/3;
5.=-64/3+22/3+42/3=0/3=0;
6.=-3/4×[-9×4/9-2]=-3/4×(-6)=9/2;
7.=-4+(-40)+0.28÷4=-44+0.07=-43.93;
8.=-1-1/2÷3×[2-9]=-1-1/6×(-7)=-1+7/6=1/6.