Cho các biểu thức sau: A = 52 - (37 + 43)

* Hướng dẫn giải

Ta có:

$\begin{array}{l}\mathrm{A}=52-\left(37+43\right)\\ =52-80\\ =-28.\\ \begin{array}{l}\mathrm{B}=512-1024+256\\ =-512+256\\ =-256.\end{array}\\ \begin{array}{l}\mathrm{C}=1128-\left(27-69\right)\\ =1128-\left(-42\right)\\ =1128+42\\ =1170.\end{array}\\ \begin{array}{l}\mathrm{D}=-128-64-\left(32+16+16\right)\\ =-128-64-64\\ =-192-64\\ =-256.\end{array}\\ \begin{array}{l}\mathrm{E}=584+\left(969-383\right)\\ =584+586\\ =1170.\end{array}\\ \begin{array}{l}\mathrm{F}=1-\left(2+27\right)\\ =1-29\\ =-28.\end{array}\\ \Rightarrow \mathrm{A}=\mathrm{F};\mathrm{B}=\mathrm{D};\mathrm{C}=\mathrm{E}.\end{array}$