Showing posts with label Associative Property. Show all posts
Showing posts with label Associative Property. Show all posts

Friday, February 22, 2013

Define Associative

Introduction to algebra:

Algebra is the branch of mathematics concerning the study of the rules of operations and relations, and the constructions and concepts arising from them, including terms, polynomials, equations and algebraic structures. Together with geometry, analysis, topology, combinatorics, and number theory, algebra is one of the main branches of pure mathematics. Please express your views of this topic Factor Polynomial Calculator by commenting on blog.

Source:  Wikipedia


Concept of associative property in algebra:


The associative property in algebra also works for addition and multiplication. For addition, the associative property in algebra means that when you add three numbers, you can first add any two of the numbers and then add the third.

Associative property for addition in algebra:

First, add any two of the numbers and then add the third.

(p+q)+r=p+(q+r)

The parentheses group numbers together. Suppose you want to add 1+2+3. You could first add 1 and 2 to get 3, and then add 3 and 3 to get 6. Or you could first add 3 and 2 to get 5, and then add 5 and 1 to get 6. The results are the same in algebra addition.

If you replace p with 1, q with 2 and r with 3, the associative property in algebra of addition looks like this:

(a+b)+c=a+(b+c)

(1+2)+3=1+(2+3)

3+3=1+5

6=6

Associative property for multiplication in algebra:

First, multiply two numbers and then multiply that product by the third number.

(p*q)*r=p*(q*r) or (pq)r=p(qr)

Again, the parentheses group numbers together. Suppose you want to solve the multiplication problem 1x2x3. You could first multiply 1x2 to get 2, and then multiply 2x3 to get 6. Or you could first multiply 2x3 to get 6, and then multiply 6x1 to get 6. The results are the same.

If you replace p with 1, q with 2, and r with 3, the associative property in algebra of multiplication looks like this:

(pq)r=p(qr)

(1*2)*3=1*(2*3)

2*3=1*6

6=6

Example for associative property in algebra:

Example 1:

Which of the following is the same as (10+12)+15?

10(12+15)

(10+12)15

10+15+12+15

10+(12+15)

Solution:

Answer (4) is the correct choice. You could first add 10 and 12 to get 22, and then add 22 and 15 to get 37. Or, you could first add 12 and 15 to get 27, and then add 10 and 27 to get 37.

Example 2:

Which of the following is the same as (5x2)x3?

5(2+3)

(3+2)5

5x2+5x3

3(5x2)

Solution:

Answer (4) is the correct choice. You could first multiply 5 and 2 to get 10, and then multiply 10 and 3 to get 30. Or, you could first multiply 2 and 3 to get 6, and then multiply 6 and 5 to get 30. Is this topic algebra 2 homework solver hard for you? Watch out for my coming posts.


Practice problem for associative:


Problem 1:

Which of the following is the same as (8+2)+5?

8(2+5)

(8+2)5

8+5+2+5

8+(2+5)

Answer: 4.

Problem 2:

Which of the following is the same as (5+2)*6?

5(2+6)

(5+6)2

(5*6)+(2*6)

(5+6)+2+15

Answer: 3.

Problem 3:

Which of the following is the same as (5*2)+6?

6+(2*5)

(5+6)2

(5*6)+(2*6)

(5+6)+2

Answer: 1.

Tuesday, January 15, 2013

Property of Opposites

Introduction of Property of Opposites:

The property of opposites is the number changing its sign, that is positive being change to negative and negative being change to positive. I like to share this Associative Property Addition with you all through my article.

For Example: Let the number be ‘’a’’ and the property of opposites of the number ‘’a’’ is ‘’-a’’.

Let we see this property of opposites are applicable for addition, subtraction, multiplication and division. In this article, we see about how the property of opposites used for solving Problems.

Property of Opposites:

Case 1: Property of Opposites in Addition

Statement: Add the number and its property of opposites is zero

Example: A + (-A) = 0

Case 2: Property of Opposites in Subtraction

Statement: difference between number and its opposites is equal to the twice of that number.

Example: A – (-A) = A + A = 2A

Case 3: Property of Opposites in Multiplication

Statement: Multiply the number and its opposites, we get negative square of that number.

Example: A × (-A) = - A2

Case 4: Property of Opposites in Division

Statement: Divide a number by it opposites or vice versa, we get -1

Example:

A ÷ (-A) = -1

(-A) ÷ (A) = -1

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Example Problems – Property of Opposites:

Example 1:

Write the value of the sum of the number 5 and its opposites.

Solution:

Given: addition of the number 5 and its opposites

Expression: 5 + (-5)

We know that sum of any number and its opposites we get 0

5 + (-5) = 0

Answer: 0

Example 2:

Multiply the number 3 and its opposites

Solution:

Given: 3 × (-3)

Formula:

A × (-A) = - A2

3 × (-3) = - 32 = -9

Answer: 3 × (-3) = -9

Practice Problems – Property of Opposites

Problem 1:

What is the value of difference between the number 6 and its opposites?

Answer: 12

Problem 2:

What is the value when the number and its opposites comes under the division operation?

Answer: -1