Question 409039: I need help on few questions. Thanks
1. mn=nm
2. (3r+2)+s=3r+(2+s)
3. If 3x=15 then 15=3x
Answer by MathLover1(20855)   (Show Source):
You can put this solution on YOUR website!
Basic Number Properties:
 , , and 
The word " " comes from "associate" or "group";the Property is the rule that refers to grouping.
For  , the rule is " "; in numbers, this means  .
For  , the rule is " "; in numbers, this means  .
The word " " comes from "commute" or "move around", so the Property is the one that refers to moving stuff around.
For addition, the rule is " "; in numbers, this means  .
For multiplication, the rule is " "; in numbers, this means  .
The Property is easy to remember, if you recall that "multiplication distributes over addition". Formally, they write this property as  . In numbers, this means, that  .
1. .........here you have the Property-the rule for multiplication
2.  .....the Property- the rule for
3. If  then  ...the Property-the rule for multiplication
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