there's a bunch of them!
Commutative property of multiplication and addition means a*b = b*a and a+b =b+a
associative property means a+b+c = a+c+b = c+a+b etc. and a*b*c =a*c*b etc
distributive property of multiplication over addition means a(b+c) = a*b+a*c or an+ac
there are others