Solve: Find the Missing Fraction in 3/10 + ? + 3/10 = 9/10

To find the missing fraction in the equation $\frac{3}{10} + \_ + \frac{3}{10} = \frac{9}{10}$, we need to determine what must be added to the sums of the known fractions to reach the total sum.

Step 1: Calculate the sum of known fractions. We have:

• $\frac{3}{10} + \frac{3}{10}$

Add the numerators together, since both fractions have the same denominator:

• $3 + 3 = 6$

Thus, the combined fraction is:

• $\frac{6}{10}$

Step 2: To find the missing fraction, subtract the sum of known fractions from the total:

• $\frac{9}{10} - \frac{6}{10} = \frac{3}{10}$

This shows that the missing fraction is indeed $\frac{3}{10}$.

Therefore, the solution to the problem is $\frac{3}{10}$.