55+66x3 .

There is a calculator on the home page.  You can do this yourself!    

Because Melody didn't tell you the answer, I will tell you it.

First multiply 66 by 3.

$$66*3=198$$

Then, you add 198 by 55.

$$198+55=253$$

So, your answer is 253.

$$Answer=253$$  

Now, you got your answer.

DS, remember the order of operations - pemdas --> multiplication before addition

Sorry!!!!!!!!! I did a mistake. I will fix the mistake right now. Thanks AzizHusain.

I will re edit my post.

Sorry.