Here are the filled-in blanks based on the concept of the Commutative Property:
The Commutative Property
a + b = b + a
5 - 4 ≠ 4 - 5
1 ≠ -1
5 + (-4) = (-4) + 5
1 = 1
The Commutative Property states that changing the order of the numbers in addition or multiplication does not change the result. However, it does not apply to subtraction or division.