\(1037+\left\{743-\left[1031-\left(+57\right)\right]\right\}\)
\(=1037-1037+\left\{743-\left(+57\right)\right\}\)
\(=0+686\)
\(=686\)
\(1037+\left\{743-\left[1031-\left(+57\right)\right]\right\}\)
\(=1037+743-1031+57\)
\(=\left(743+57\right)+\left(1037-1031\right)\)
\(=800+6\)
\(=806\)
\(1037+\left\{743-\left[1031-57\right]\right\}\)
\(=1037+\left\{743-1031+57\right\}\)
\(=1037+743-1031+57\)
\(=\left(1037-1031\right)+\left(743+57\right)\)
\(=6+800=806\)
\(1037+\left\{743-\left[1031-\left(+57\right)\right]\right\}\)
\(=1037+\left\{743-974\right\}\)
\(=1037+\left(-231\right)\)
\(=806\)
\(1037+\left\{743-\left[1031-\left(+57\right)\right]\right\}\)
\(=1037+\left\{743-\left[1031-57\right]\right\}\)
\(=1037+\left\{743-974\right\}\)
\(=1037+\left\{-231\right\}=1037-231=806\)
Học tốt nha !
