Final answer:
The equation represents the Associative Property of Addition, which allows numbers to be grouped in any order without affecting the sum.
Step-by-step explanation:
The property being demonstrated in the equation 7 + (11 + 10) = (7 + 11) + 10 is known as the Associative Property of Addition. This property states that when adding three or more numbers, the way in which the numbers are grouped does not affect the sum. For example, (A + B) + C = A + (B + C). This allows us to add or group numbers in any order and still get the same result, improving the flexibility and efficiency of our calculations.