\(a,-7624+\left(1543+7624\right)\)
\(=\left[\left(-7624\right)+7624\right]+1543\)
\(=0+1543=1543\)
\(b,\left(27-514\right)-\left(486-73\right)\)
\(=27-514-486+73\)
\(=\left(27+73\right)-\left(514+486\right)\)
\(=100-1000\)
\(=-900\)
Chúc bạn làm bài đạt điểm cao nhé !
a) \(-7624+\left(1543+7624\right)\)
\(=-7624+1543+7624\)
\(=\left(-7624+7624\right)+1543=0+1543=1543\)
b) \(\left(27-514\right)-\left(486-73\right)\)
\(27-514-486+73\)
\(=\left(27+73\right)-\left(514+486\right)=100-1000=-900\)
tk nmk nh. ~học tốt!
trả lời
a) \(-7624+\left(1543+7624\right)\)
\(=-7624+1543+7624\)
\(=\left\{\left(-7624\right)+7624\right\}+1543\)
\(=1543\)
b)\(\left(27-514\right)-\left(486-73\right)\)
\(=27-514-486+73\)
\(=\left(27+73\right)-\left(514+486\right)\)
\(=100-1000\)
\(=-900\)
