add. $\frac{3}{10}+\frac{9}{10}=$

Explanation:

Step1: Add numerators

Since the denominators are the same, we add the numerators. $3 + 9=12$. The fraction becomes $\frac{3 + 9}{10}=\frac{12}{10}$.

Step2: Simplify the fraction

We can simplify $\frac{12}{10}$ by dividing both the numerator and denominator by 2. $\frac{12\div2}{10\div2}=\frac{6}{5}=1\frac{1}{5}$.

Answer:

$\frac{6}{5}$ or $1\frac{1}{5}$