Bai 1: Rút gọn biểu thức sau
a) A= $\frac{9}{50}$ - $\frac{13}{75}$ - $\frac{1}{6}$
b) B = $\frac{3}{8}$ + $\frac{3}{15}$ + $\frac{3}{7}$
c) C = $\frac{38}{45}$ - ($\frac{8}{45}$ - $\frac{17}{51}$ - $\frac{3}{11}$)
d) D = $\frac{4}{20}$ + $\frac{16}{42}$ + $\frac{6}{15}$ + $\frac{-3}{5}$ + $\frac{2}{21}$ + $\frac{-10}{21}$ + $\frac{3}{20}$
e) E = $\frac{19}{60}$ + $\frac{29}{100}$ + $\frac{39}{150}$ + $\frac{49}{300}$
Loga
Sinh Học lớp 12
