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Word Problems for Multiplying +/-?  TOPIC_SOLVED

Can anyone show me a good resource for practicing word problems for multiplying positive and negatives? It maybe will help me get a more solid understanding of *why*, say, a negative times a negative is a positive. I get the process, but not sure I have a full grasp yet of the whys and wherefores. A...
by New2Math
on Fri Oct 12, 2012 7:21 pm
 
Forum: Arithmetic
Topic: Word Problems for Multiplying +/-?
Replies: 1
Views: 2565

Distributive Property  TOPIC_SOLVED

On this page http://www.purplemath.com/modules/numbprop.htm I found the following example: Simplify 23 + 5x + 7y – x – y – 27. Justify your steps. 23 + 5x + 7y – x – y – 27 original (given) statement 23 – 27 + 5x – x + 7y – y Commutative Property (23 – 27) + (5x – x) + (7y – y) Associative Property ...
by New2Math
on Fri Oct 12, 2012 8:53 pm
 
Forum: Pre-Algebra
Topic: Distributive Property
Replies: 3
Views: 3315

Re: Distributive Property  TOPIC_SOLVED

Ok, thanks I think I understand. Since it is the same x = x * 1 that makes sense to me. x times (5) minus x (itself) and x replaces the (1) during the multiplication process. I can grasp it but I guess I'm having some issues with my independent thought process when I actually have to do it myself in...
by New2Math
on Sat Oct 13, 2012 7:37 pm
 
Forum: Pre-Algebra
Topic: Distributive Property
Replies: 3
Views: 3315

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