Bài 1
a, ($\frac{-5}{11}$) x $\frac{7}{15}$ x ($\frac{11}{-5}$)
b, ($\frac{-1}{6}$) x ($\frac{15}{19}$) x $\frac{38}{45}$
c, ($\frac{-5}{11}$) X $\frac{3}{11}$ + ($\frac{13}{18}$) X $\frac{3}{22}$
d, (2$\frac{2}{15}$ x $\frac{9}{17}$ x $\frac{3}{32}$) : ($\frac{-3}{17}$)
Loga
Sinh Học lớp 12
