Question

 

TÍNH

1/6+2/15+4/45+2/99+9/220+10/600

 

Answer 1

1/6+2/15+4/45+2/99+9/220+10/600=7/15

mk rút gọn luôn rồi đó!k mk nhé!^^

Answer 2

\(\frac{1}{6}+\frac{2}{15}+\frac{4}{45}+\frac{2}{99}+\frac{9}{220}+\frac{10}{600}\)

\(=\frac{1}{2.3}+\frac{2}{3.5}+\frac{4}{5.9}+\frac{2}{9.11}+\frac{9}{11.20}+\frac{10}{20.30}\)

\(=\frac{1}{2}-\frac{1}{3}+\frac{1}{3}-\frac{1}{5}+\frac{1}{5}-\frac{1}{9}+\frac{1}{9}-\frac{1}{11}+\frac{1}{11}-\frac{1}{20}+\frac{1}{20}-\frac{1}{30}\)

\(=\frac{1}{2}-\frac{1}{30}\)

\(=\frac{15}{30}-\frac{1}{30}\)

\(=\frac{14}{30}=\frac{7}{15}\)

Ủng hộ mk nha ^_-