[π-4]º×1/2-³√-27×[-√1/9]

问题描述:

[π-4]º×1/2-³√-27×[-√1/9]

[π-4]º×1/2-³√-27×[-√1/9]
=1*1/2-(-3)*(-1/3)
=1/2-1
=-1/2