Evaluate $\frac{3}{10}+\frac{3}{50}$310+350, expressing your answer as a decimal.

Evaluate $\frac{4}{5}+\frac{3}{100}+\frac{1}{500}$45+3100+1500, expressing your answer as a decimal.

Evaluate $8+\frac{8}{10}+\frac{1}{100}+\frac{1}{1000}$8+810+1100+11000, expressing your answer as a decimal.

Evaluate $0.1+0.5$0.1+0.5 expressing your answer as a fraction