## Algebra 1

$80$
We start with the given expression: $55.3+0.2+23.8+0.7$ The commutative property of addition states that changing the order of the addends does not affect the sum. We use the commutative property to rearrange the addends: $55.3+0.7+23.8+0.2$ The associative property of addition states that changing the grouping of the addends does not affect the sum. We use the associative property to group the addends: $(55.3+0.7)+(23.8+0.2)$ We use the order of operations to simplify the expression: $56+24$ We add: $80$