Complete the Expression: Find the Missing Symbol in 5:5?5×1

To solve this problem, we need to evaluate the two expressions $5:5$ and $5 \times 1$ and then determine the correct relational sign between them.

• Step 1: Evaluate $5:5$. To find $5:5$, we perform the division $5 \div 5$, which is equal to $1$.

• Step 2: Evaluate $5 \times 1$. To find $5 \times 1$, we perform the multiplication, which is also equal to $5$.

• Step 3: Compare the results of the two evaluated expressions.
  Evaluated result for $5:5$ is $1$.
  Evaluated result for $5 \times 1$ is $5$.

• Conclusion: Since $1$ is less than $5$, the correct relational sign between the expressions is '<'.

Therefore, the correct inequality is $5:5 < 5 \times 1$.