SOLUTION: I need help on how to solve these questions. {{{ -125 / 25 }}} Also {{{(-8)(-4)}}} Finally {{{ -36 / -9 }}} Thanks so much. Also i would like to learn the procedure to lear

Algebra ->  Signed-numbers -> SOLUTION: I need help on how to solve these questions. {{{ -125 / 25 }}} Also {{{(-8)(-4)}}} Finally {{{ -36 / -9 }}} Thanks so much. Also i would like to learn the procedure to lear      Log On


   

Question 210258: I need help on how to solve these questions. +-125+%2F+25+
Also %28-8%29%28-4%29
Finally +-36+%2F+-9+

Thanks so much. Also i would like to learn the procedure to learn how to solve this.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
-125%2F5 Start with the given expression.


%28-25%2A5%29%2F5 Factor -125 into -25*5. Note: -25*5=-125


%28-25%2Across%285%29%29%2Fcross%285%29 Cancel out the common factors.


-25 Simplify


So -125%2F5=-25


An alternative is to use long division.

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For problem #2, you need to know your multiplication. Also, it turns out that when you multiply two negative numbers, the result is positive. Why? Think of negatives as opposites...ie they 'undo' positive numbers.


So %28-8%29%28-4%29=32

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-36%2F9 Start with the given expression.


%28-4%2A9%29%2F9 Factor the numerator.


%28-4%2Across%289%29%29%2Fcross%289%29 Cancel out the common factors.


-4 Simplify


So -36%2F9=-4


In this case, if you know your multiplication, you can take note that -9*4=-36 and then work from there.