八妹又来了,

我来帮你：


1、原式 = 2/5-1-|1/2|-|2又1/4|-(-2.75)
= 2/5-1-1/2-2又1/4+2.75
= -3/5


2、原式=(-73)×(1/2-0.5)÷(-8/29)
=(-73)×0÷(-8/29)
=0


3、原式=2×(-3)²-4×(-2)+10
=2×9+4×2+10
=36


4、原式= -9÷3+(1/2-2/3)×12
= -3+(-1/6)×12
= -3-2
= -5


5、原式= -1^4-(2.5-2)×1/4×[4-(-2)³]
= -1-0.5×1/4×[4-(-8)]
= -1-0.5×1/4×12
= -1-1.5
= -2.5