tính nhanh
\(a,1+3-5-7+9+11--.-397-399\)
\(b,1.2.3-9-1.2.3...8-1.2.3-7.8^2\)
\(c,1152-\left(374+1152\right)+\left(-65+344\right)\)
Loga
Toán lớp 6
tính nhanh
\(a,1+3-5-7+9+11--.-397-399\)
\(b,1.2.3-9-1.2.3...8-1.2.3-7.8^2\)
\(c,1152-\left(374+1152\right)+\left(-65+344\right)\)
