Câu hỏi của Nguyễn Tạ Khánh Ngọc

a) \(-312+198=198-312=-114\)b) \(483+-56+263+-64=\left(483+263\right)-\left(56+64\right)=746-120=626\)c) \(-456+-554+1000=1000-\left(456+554\right)=1000-1010=-10\)d)\(-87+-12+487+-512=\left(487-87\right)-\left(512+12\right)=400-524=-124\)Câu trả lời: a) \(-312+198=198-312=-114\)b) \(483+-56+263+-64=\left(483+263\right)-\left(56+64\right)=746-120=626\)c) \(-456+-554+1000=1000-\left(456+554\right)=1000-1010=-10\)d)\(-87+-12+487+-512=\left(487-87\right)-\left(512+12\right)=400-524=-124\)