Answer:
The answer to your problem is, 69
Explanation:
First lets split the problem into the following:
27 + 18 13 + 11
First we are going to do, 27 + 18
27 + 18 = 45. Done
Next we are going to do, 13 + 11
13 + 11 = 24. Done
Add them, 24 + 45
24 + 45 = 69
Thus the answer to your problem is, 69