How can addition properties me add whole numbers

There are four addition properties that help to add whole numbers :

For any  whole number a, b, and c ;

1. Closure property of addition -  

For example:

2+3=5

4+3=7

We can conclude that if we add any two whole number , we get another whole number.

2. Associative property of addition- when any whole number or variable are added, then that can be grouped in different way without changing result

For example:  

2+(3+4)=(2+3)+4

3. Commutative property of addition- when any  whole number or variable are added, then the order changed without changing the result.

For example: 2+3=3+2

4. Identity property of addition- when 0 is added to a whole number or variable , the result is the same variable or number.

For example: 3+0=0+3

0 is called an Identity for addition of whole numbers.

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation:

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98