The property shown in the given mathematical expression can be identified as follows:
[tex]\[
0.8 + (1.2 + (-3)) = (0.8 + 1.2) + (-3)
\][/tex]
1. Observe that in the expression, the numbers are grouped differently but the same numbers are involved in the addition.
2. On the left side of the equation, the numbers 0.8 and the sum of 1.2 and -3 are grouped together.
3. On the right side of the equation, the sum of 0.8 and 1.2 is grouped together, followed by the addition of -3.
The property demonstrated here is that the sum remains the same regardless of how the numbers are grouped. This is characteristic of the Associative Property of Addition.
Thus, the property shown is:
Associative Property of Addition
