1. It illustrates the commutative property of multiplication because the answer is the same even if you switch the order. 2. B because the answer is the same if you switch the places of the parentheses 3. B same reason as above 4. A because no matter what order, the answer is the same
You would have to make the numbers have the same denominator. So you would have -15/20 + 4/20 Then you would have to put the sign of the higher number on it, So you would have -15/20 + 4/20 = -11/20
