Given in the question:
The amount of calories in the sandwich is144 Calories are from carbohydrates, 108 Calories are from fat, and 56 Calories are from protein.
To find the total number of calories in the sandwich, we need to use the Associative Property of Addition.
Associative property of Addition states, if you are adding three real numbers, the sum is always the same regardless of their grouping.
Associative property of Addition: (a + b) + c = a + (b + c)
Total number of calories in the sandwich is:
Total calories = calories in (carbohydrates + Fat + proteins)
Total number of calories in the sandwich is 308 calories