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lub (-2 1/2)³= (-5/2)*(-5/2)*(-5/2)=25/4*(-5/2)= - 125/8= -15 5/8
(-3)³ - (1/2)³ · (-1 1/3)² =-27 - 1/8*(-4/3)²= -27 -1/8*(-16/9)=-27 - 16/72= - 27 - 2/9
= - 27 2/9
5 + (1/5)² *2= 5 + 1/25*2= 5 + 2/25 = 5 2/25