Sam: $$\frac{2}{10}+\frac{3}{10}=\frac{5}{10}$$  Total: $$\frac{5}{10}+\frac{3}{10}=\frac{8}{10}$$  Left: $$\frac{10}{10}-\frac{8}{10}=\frac{2}{10}$$ 
Ace and Sam were painting a house. Ace painted $$\frac{3}{10}$$ of the house. Sam painted $$\frac{2}{10}$$ more than Ace. What fraction of the house still needs to be painted? 
1. $$\frac{2}{10}$$ 
2. $$\frac{3}{10}$$ 
3. $$\frac{5}{10}$$ 
4. $$\frac{8}{10}$$ 