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Question:

algebragurl101
algebragurl101
Student
High School - 9th Grade

What is the property illustrated in (2+g)+3 = 2+(g+3)  ?

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Posted by algebragurl101 on Tuesday September 22, 2009 at 2:34 PM and tagged with illustrated, math, property.

Answers:


  1. marilynn07 Teacher
    High School - 9th Grade

    eNotes Editor

    This is the associative property of addition, not the commutative property.

    The commutative property only deals with 2 numbers not 3.

    The order of the numbers or their groupings do not affect the result.

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

    3+3 = 2+4 (eliminate parehtneses)

    6 = 6

    Instead of a variable, I have substituted real numbers to illustrate how this works. You of course would eliminate the parentheses first.

     

    The same is true of multiplication as well.

    (2*4)*5 = 2*(4*5)

    8*5 = 2*20 (eliminate parentheses)

    40 = 40

    Again, you eliminate the parentheses first and then work out the problem the rest of the way.

     

    Sources:
    http://www.mathleague.com/help/wholenumbers/wholenumbers....

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    Posted by marilynn07 on Tuesday September 22, 2009 at 5:26 PM

  2. neela
    neela Teacher
    Graduate School

    eNotes Editor

    (2+g)+3=2+(g+3). This  property is called associative property of the operation +, the addtion of numbers, in group theory of numbers. Or the addition of numbers is associative. Thus for any numbers a,b,c  if =(a+b)+c=a+(b+c), the addtion of numbers  is associative. The associative property of addtion has the use of has use of indepedence groupig while doing the operation.

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    Posted by neela on Tuesday September 22, 2009 at 6:51 PM


  3. kemorton Teacher
    Elementary / Primary

    eNotes Editor

    This is the Associative Property of Addition.  This property demonstrates the rule that 2 expressions are equal no matter how the numbers are grouped when all operations are addition. For example:

    (3+10)+5 = 3+(10+5)

    Each side of the equal sign is an expression.  The expression on the left shows 3+10 as a group.  The expression on the right shows 10+5 as a group.

    (3+10)+5 = 18  Three plus ten equals 13. 13 plus five equals 18.

    3+(10+5) = 18  Ten plus five equals 15. 15 plus three equals 18.

    Rules state that any problem in parentheses must be solved first.  You can see that regardless of how the numbers are grouped the expressions are equal.

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    Posted by kemorton on Thursday October 1, 2009 at 10:31 PM