Answer:
Associative propertry of addition.
Step-by-step explanation:
The associative property of addition states that:
[tex]a+(b+c) = (a+b)+c[/tex]
It states that we can add numbers regardless of the groups. The sum does not change irrespective of how the addends are grouped.
We are given the expression:
[tex]r + (h + t)[/tex]
It can be written as:
[tex](r+h) + t[/tex]
It can also be written as:
[tex]r + (h+t) = (r+t) + h = (h+t)+r = h + (t+r)[/tex]
Whatever maybe the arrangement of r, h and t, their sum will always be equal. We can regroup them in many ways but the sum remains the same.
