\(-\left(315,4+275\right)+4.315-\left(10-275\right)\)
\(=-315,4-275+1260-10+275\)
\(=-315,4+1260-10=934,6\)
Chúc bạn học tốt!!!
\(B=-\left(315,4+275\right)+4\cdot315-\left(10-275\right)\)
\(=-315,4-275+4\cdot315-10+275\)
\(=-315,4+1260-10\)
\(=934,6\)