Tính:
\(2448:\left[119-\left(23-6\right)\right]\)
\(=2448:\left[119-17\right]\)
\(=2448:102\)
\(=24\)
___________________________
\(\left\{789+\left[324:\left(78-66\right)\right]\right\}+273\)
\(=\left\{789+\left[324:12\right]\right\}+273\)
\(=\left\{789+27\right\}+273\)
\(=816+273\)
\(=1089\)
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