Find the value of $$\frac{1}{1\times2}+\frac{1}{2\times3}+\frac{1}{3\times4}+\frac{1}{4\times5}+\frac{1}{5\times6}+....+\frac{1}{9\times10}$$

A

$$\frac{1}{10}$$

B

$$\frac{9}{10}$$

C

$$\frac{5}{11}$$

D

$$\frac{2}{5}$$