\(A=-\left[-506+732-\left(-2000\right)\right]-\left(506-1732\right)\)
\(\Rightarrow A=-\left(-506+732+2000\right)-\left(506-1732\right)\)
\(\Rightarrow A=506-732-2000-506+1732\)
\(\Rightarrow A=\left(506-506\right)+\left(1732-732\right)-2000\)
\(\Rightarrow A=0+1000-2000\)
\(\Rightarrow A=-2000+1000\)
\(\Rightarrow A=-\left(2000-1000\right)\)
\(\Rightarrow A=-1000\)
\(A=-\left[-506+732-\left(-2000\right)\right]-\left(506-1732\right)\)
\(\Leftrightarrow A=-\left(-506+732+2000\right)-\left(506-1732\right)\)
\(\Leftrightarrow A=506-732-2000-506+1732\)
\(\Leftrightarrow A=\left(506-506\right)+\left(1732-732\right)-2000\)
\(\Leftrightarrow A=0+1000-2000\)
\(\Leftrightarrow A=1000-2000=-1000\)
Vậy ....................
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A= -[ -506+732-(-2000)] - (506-1732)