Anything with the keywordthis in JS can't be 7kyu I would say. I spent also a while to figure out how to handle this.

Your solution does not even pass sample tests. You can start with debugging these locally.

1. Check on what inputs your solution fails (see here how)
2. Recreate failing test case locally, run your solution in your IDE for such input
3. Check if your solution returns correct answer in your IDE. If not, debug through it.

The real, silly, and big addition names are describing the test not a type of function used. You always perform the same operation as described in the description. The tests then do a few examples where the result of the fucntion is what would be expected with 'real' addition; then some where you have to remember not to carry the difits; and then some where the input numbers get quite big.

Check spelling of your function versus what it is being tested against.

Thanks :D!

Use the keyword this in your code.

Can you put, still under spoiler, your complete code in git flavored markdown and explain the problem?

Like this:

```ruby
#your code here
```