Which choice shows 40+30+10 rewritten correctly using the commutative property and then simplified correctly?
First, we can use the commutative property to rearrange the numbers:
40 + 30 + 10 can be rewritten as 30 + 10 + 40.
Then, we can simplify the expression:
30 + 10 + 40 = 40 + 40 = 80.
So, the correct rewriting and simplification of 40 + 30 + 10 is 80.