Complete the Expression: Find the Missing Sign in 5+5□20-10

To solve this problem, we need to evaluate both sides of the expression $5 + 5 \Box 20 - 10$ to find the appropriate sign ($=$, $<$, $>$).

• Step 1: Calculate the left side of the expression:
  $5 + 5 = 10$
• Step 2: Calculate the right side of the expression:
  $20 - 10 = 10$
• Step 3: Compare the results:
  The left side equals $10$ and the right side also equals $10$.
• Step 4: Determine the correct sign:
  Since $10 = 10$, the appropriate sign to use is $=$.

Thus, the correct sign that completes the expression $5 + 5\Box20 - 10$ is $=$.