计算下面的题
解:①(1/2)°-[(1/3)^(-2)] ②(-1/2)²÷[(-2)^(-3)]×[(-2)^(-2)]
=1-3² =(-1/2)²÷(-1/2)³×(-1/2)²
=1-9 =(1/4)÷(-1/8)×(1/4)
=-8 =-(1/4)×8×(1/4)
=-1/2
负八和负二分之一
(1)答案为-5
(2)答案为8
解 (1)(1/2)°-(1/3)^-2
=1-1/(1/3)²
=1-9
=-8
(2)(-1/2)²÷(-2)^(-3)X(-2)^-2
=1/4X(-2)³X1/(-2)²
=1/4X(-8)X1/4
=-1/2
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