Answer:
A) What Is the Property of 16 + 31 =31 + 16?
This is the commutative property of the addition, it says that the is the same to ad A plus B than B plus A:
A + B = B + A
B) What Is the Property of (3 x 10) x 8 = 3 x (10 x 8)
This is the associative property of the multiplication, it says that does not matter what multiplication you solve first:
(A x B) x C = A x ( B x C)
C) What Is the Property of 21 x 9 = 9 x 21?
This is the commutative property of the multiplication, this says that the order of the factors does not affect the product:
A*B = B*A
D) What is the Property of 0 +91 = 91?
This is the existence of the zero: This property says that there exists a number X such for every number A we have that:
X + A = A
so X is a neutral term in the addition, and X = 0
