Properties of Operations
Commutative (Addition):
a
+
b
=
b
+
a
Commutative (Multiplication):
ab
=
ba
Associative (Addition):
(
a
+
b
)
+ c
=
a
+ (
b + c
)
Associative (Multiplication):
(
ab
)
c
=
a
(
bc
)
More properties…
These first.