Ta có : $(-113-39)+(239-400)-100-287$
$=-113-39+239-400-100-287$
$=-(113+287)+(239-39)-(400+100)$
$=-400+200-500=-700$
\(\left(-113-39\right)+\left(239-400\right)-100-287\)
\(=-113-39+239-400-100-287\)
\(=-\left(113+287\right)+\left(-39+239\right)-\left(400+100\right)\)
\(=-400+200-500=-700\)
Chúc bạn học tốt!!!
\(\left(-113-39\right)+\left(239-400\right)-100-287\)
\(=-113-39+239-400-100-287\)
\(=-\left(113+287\right)-\left(-39+239\right)-\left(400+100\right)\)
\(=-400+200-500\)
\(=-700\)
\((-113-39)+(239-400)-100-287\)
\(=-113-39+239-400-100-287\)
\(=(-113-287)+(239-39)-(400+100)\)
\(=-400+200+-500\)
\(=-700\)
\(\left(-113-39\right)+\left(239-400\right)-100-287\)
\(=\) \(-113-39+239-400-100-287\)
\(=\) \(\left(-113+287\right)\) \(+\) \(\left(-39+239\right)\) \(-\) \(\left(400+100\right)\)
\(=\) \(-400\) \(+\) \(200\) \(-\) \(500\)
\(=\) \(-200-500\)
\(=\) \(-700\)
\(\left(-113+39\right)+\left(239-400\right)-100-287\)
\(=\left(-74\right)+\left(-161\right)-100-287\)
\(=-74-161-100-287\)
\(=-622\)
