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1. Write two equations that prove the Associative Property is not true for subtraction.

2. Write two equations that prove the Associative Property is not true for division.

Asked by MamiSanford at 9:25 PM on Nov. 17, 2008 in Tweens (9-12)

Level 1 (0 Credits)
• Hope that helps. I went to this website:

To get my definition of an Associative Property, they also have some sample problems, that may help you out.

Answer by CarolynBarnett at 9:39 PM on Nov. 17, 2008

• (16-7) - 3= 6
(7 - 3) - 16 = -12

:)
are they in negatives yet or will that give it away that they got help?

(12/2)/3= 2
(2/3)/12=0.5555555555555555555555555555555555555555

Answer by Anonymous at 9:28 PM on Nov. 17, 2008

• (8-3)-2=3
8-(3-2)=7

(8/2)/2=2
8/(2/2)=4

Answer by flutterfae at 9:31 PM on Nov. 17, 2008

• oops answer to the 8/(2/2)=8 not 4

Answer by flutterfae at 9:32 PM on Nov. 17, 2008

• No, he is not doing negatives yet.

Answer by MamiSanford at 9:34 PM on Nov. 17, 2008

• (8-3)-2=3
8-(3-2)=7

(8/2)/2=2
8/(2/2)=8

:) that help?

you can actually substitute any numbers in the equations, it won't work out the same #

Answer by flutterfae at 9:36 PM on Nov. 17, 2008

• (4-2)-1=1
4-(2-1)=3

(4/2)/1=2
4/(2/1)=4

see how it works?

Answer by flutterfae at 9:37 PM on Nov. 17, 2008

• "The addition or multiplication of a set of numbers is the same regardless of how the numbers are grouped. The associative property will involve 3 or more numbers. The parenthesis indicates the terms that are considered one unit.The groupings (Associative Property) are within the parenthesis. Hence, the numbers are 'associated' together. In multiplication, the product is always the same regardless of their grouping. The Associative Property is pretty basic to computational strategies. Remember, the groupings in the brackets are always done first, this is part of the order of operations."

Answer by CarolynBarnett at 9:37 PM on Nov. 17, 2008

• With the above description of an Associative Property, you can clearly see that division ( * is used to demonstrate division here) and subtraction do not hold true to the definition of an Associative Property.

(2 - 5) - 4 = -7 <----These two problems, if addition, would be equal ----> 2 - (5 - 4) = 1

(3 * 2) * 4 = 3 3/4 <----These two problems, if addition, would be equal ----> 3 * (2 * 4) = 6

Answer by CarolynBarnett at 9:38 PM on Nov. 17, 2008

• thanks I understand now

Answer by MamiSanford at 9:42 PM on Nov. 17, 2008

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