Children, in the world of mathematics there are some simple rules that we must learn follow. These rules are called Properties and they will be your guides into the realms of algebra and beyond. Learn them well, and you will find the answers…
4 + 5 = 5 + 4 is COMMUTATIVE, COMMUTATIVE
x + y = y + x is COMMUTATIVE, COMMUTATIVE
3 x 5 = 5 x 3 is COMMUTATIVE, COMMUTATIVE
Rearrange the numbers and get the same answer is COMMUTATIVE, COMMUTATIVE
(4 + 5) + 6 = (6 + 4) + 5 is ASSOCIATIVE