Solve the Addition Equation: Finding the Missing Number in 15 + □ = 37

To solve the given problem, we need to find the missing number that, when added to 15, equals 37. We'll use a number line approach that involves taking two jumps.

First, we'll make a jump from 15 to the next round (friendly) number, which is 20. This first jump is:

$20 - 15 = 5$

Next, we'll make a second jump from 20 to 37. This second jump is:

$37 - 20 = 17$

Now, we'll add these two jumps together to find the total increase from 15 to 37:

$5 + 17 = 22$

Thus, the value of the missing number is $22$.

Therefore, the solution to the problem is $\Box = 22$.