1) 3-8 · 310 = 3(-8+10) = 32 = 9
2) 10-5 : 10-8 = 10(-5 - (-8)) = 103 = 1000
3) (3-2)-3 = 3(-2 · -3) = 36 = 729
4) (3-2)3 = 3(-2 · 3) = 3-6 = 1/729
5) 27 · 2-5 = 2(7 + (-5)) = 22 = 4
6) 10-6 : 104 = 10(-6 - 4) = 10-10 = 1/1010
7) (2-3)-1 = 2(-3 · -1) = 23 = 8
8) (2-2)-2 · 2-5 = 24 · 2-5 = 2(4 + (-5)) = 2-1 = 1/2