To solve $\frac{3}{10} + \frac{2}{4}$, let's proceed with the following steps:

1. Convert each fraction to have a common denominator, if necessary.

   • The least common multiple (LCM) of the denominators 10 and 4 is 20.

2. Convert each fraction to have 20 as the denominator:

   • $\frac{3}{10} = \frac{3 \times 2}{10 \times 2} = \frac{6}{20}$
   • $\frac{2}{4} = \frac{2 \times 5}{4 \times 5} = \frac{10}{20}$

3. Add the fractions: $\frac{6}{20} + \frac{10}{20} = \frac{6 + 10}{20} = \frac{16}{20}$

4. Simplify the result if possible:

   • $\frac{16}{20} = \frac{4}{5}$ (by dividing the numerator and the denominator by 4).

Thus, $\frac{3}{10} + \frac{2}{4} = \frac{4}{5}$.

Would you like further details on fraction operations, or do you have any questions?

Here are five related questions for practice:

1. What is $\frac{1}{5} + \frac{3}{10}$?
2. Simplify $\frac{7}{8} + \frac{1}{4}$.
3. Add $\frac{5}{12} + \frac{3}{8}$.
4. How do you add fractions with different denominators?
5. Can you simplify $\frac{9}{15}$?

Tip: When adding fractions, always look for the least common denominator to simplify the calculation process.