-0.5²+1/4-I-2²-4I÷(-4)
=一0.25十1/4一8÷(一4)
=2
-0.5²+1/4-I-2²-4I÷(-4)
=-0.25+0.25-8÷(-4)
=0-(-2)
=2
这个要注意-0.5²=-(1/2)²=-1/4
-0.5²+1/4- |-2²-4|÷(-4)
=-0.25 + 1/4 -|-8|÷(-4)
=-|-8|÷(-4)
=-8÷(-4)
=2
=-0.025+0.25-(-8)÷(-4)
=0.025+0.25+(-2)
=0.275-2
=-1.725
够详细了吧