Complete the Expression: Finding the Missing Sign in 20+5□45-20

To solve this problem, we'll follow these steps:

• Step 1: Calculate $20 + 5$
• Step 2: Calculate $45 - 20$
• Step 3: Compare the results from Step 1 and Step 2

Now, let's work through each step:

Step 1: Calculate $20 + 5$.
$20 + 5 = 25$.

Step 2: Calculate $45 - 20$.
$45 - 20 = 25$.

Step 3: Compare the two calculated results.
We have $25$ on both sides, which means $25 = 25$.

Therefore, the appropriate sign to choose is the equals sign, $=$.

The solution to the problem is $=$.