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Tuesday, January 21, 2014

Rafael's Multiplying and Dividing Scribe Post

First of all you'll need the  sign rule from adding all the way to subtracting.
The sign rules are:

If theres two of the same integers (+,-) it means the answer is positive
eg. (+4)+(+9)=+13

If the signs are different (+,-) the answer would be negative
eg. (-4)-(+9)=-13

The sign rule only works while using subtracting, dividing, multiplying, and adding
Examples:
(1.)(+4)+(+9)=+13 (2.)(-4)-(+9)=-13

(3.)(-4)-(-9)=+5 (4.)(+3)x(+2)=+6

(5.)(+3)x(-3)=-9 (6.)(-5)x(-5)=+25

(7.)(-8)÷(+4)=-2 (8.)(-8)÷(-4)=+2

(9.)(+8)÷(-4)=-2

Sentences for both multiplying and division are:

Multiplying sentences always go with groups of, like:
eg. 3 groups of +2 or +6

Dividing sentences always go with either Share no. into no. equal groups or how many groups of no. are in no., like:
eg. Share -8 into +4 equal groups or -2
eg. how many groups of -4 are in +8 or -2

These are the multiplying and dividing diagrams:























But Dividing has so much diagrams based in sentences, like:























And Dividing also has some division that can't use one of the two statements, like:

eg. (-8)÷(-4)=+2
How many groups of (-4) are in (-8)/ can't use "share" statements/ CAN BE DIAGRAMED

eg. (+8)÷(-4)=-2 
How many groups of (-4) are in (+8)/ can't use "share" statements/ CAN BE DIAGRAMED

And then there's something called the Multiplicative Inverse
Which means the multiplication statement can't be diagramed like this question, but can be stated.
eg. (-4)x(-2)=+8         

                                    



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