1.
0.125²º¹º×8
=0.125²ºº9×0.125×8
=0.125²ºº9
2.
（-2）²º¹º×（-0.5）²ºº9
= -2×（-2²ºº9）×（-0.5）²ºº9
= -2×（-2×（-0.5））²ºº9
= -2×（1）²ºº9
= -2