What is the property of 16 + 31 =31 + 16?
what is the property of (3 x 10) x 8 = 3 x (10 x 8)
what is the property of 21 x 9 = 9 x 21?
what is the property of 0 +91 = 91?
answer i dont understand you if you did.

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

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3

answer is 12345678900987654321234567890987654321

step-by-step explanation: