The sum of $2 + 2$ is $4$.

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Here are 5 related questions:

1. What is $2 + 3$?
2. What is $4 + 4$?
3. How would you represent $2 + 2$ on a number line?
4. Can you add negative numbers, such as $2 + (-2)$?
5. What is the sum of $2 + 2 + 2$?

Tip: When adding, you're essentially increasing a value by another. For example, $2 + 2$ means starting from 2 and moving 2 steps forward.