Cho các biểu thức sau: A=52−(37+43); B=512−1024+256; C=1128−(27−69)

* Hướng dẫn giải

Ta có

$\begin{array}{l}A=52-\left(37+43\right)\\ =52-80\\ =-28.\end{array}$

$\begin{array}{l}B=512-1024+256\\ =-512+256\\ =-256.\end{array}$

$\begin{array}{l}C=1128-\left(27-69\right)\\ =1128-\left(-42\right)\\ =1128+42\\ =1170.\end{array}$

$\begin{array}{l}D=-128-64-\left(32+16+16\right)\\ =-128-64-64\\ =-192-64\\ =-256.\end{array}$

$\begin{array}{l}E=584+\left(969-383\right)\\ =584+586\\ =1170.\end{array}$

$\begin{array}{l}F=1-\left(2+27\right)\\ =1-29\\ =-28.\end{array}$

$\Rightarrow A=F;B=D;C=E.$