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Monday, January 13, 2014

Katrina's Integer Scribe Post




Adding and Subtracting integers  


Example.

+7+-2= -5
have 7 and owe 2= owe 5

If you have to show the work you put 7 positive and 2 negatives.
+ + + + + + +
-  -            

After you draw you find the zero pairs.

+ + + + + + +
-  -            

That is how you get the answer. 

Removing

To add or subtract something that's not there you have to do the zero pair. You only use the zero pairs when you happen to see 2 negative sign right beside each other.

Example: 

6-(-9)= 15

have 6 and remover -9

+ + + + + +    - - - - - - - - - >>>>>> remove
                      + + + + + + + +

+ + + + + + + + + + + + + + + = 15


~ We have 6 and we owe9 but we can't remover 9 from 6 because 9 is a higher number than 6, so we have to add the zero pairs. We need to add 9 zero pairs and remover 9 zero pairs. Now we have 6 and have 9, we add those two numbers together and we got the answer. :)

6+9= 15



examples.

(-3) - 5= -8 ( we don't have to remove because we only remover when we have 2 negative sign together -(-7) ) 

owe 3 and owe 5= owe 8


1 -(- 2)= 3

Have 1 and remove owe 2= Have 3

+       - - >>>>>>>>>>>> remove.
        + +

+++= have 3

(-8) - 4= 12

owe 8 and owe 4= owe 12

- - - - - - - -    - - - - 

4 comments:

  1. Thanks for adding each of the steps! It really helped me to get the answer. One thing you could include is a video but overall, your scribe post had really helped me a lot! Good job! (:

    ReplyDelete
  2. Thank you for including multiple examples, it really helps us to learn each step as we practice. Thanks! :))

    ReplyDelete
  3. Good job Katrina!!
    your scribe post is easy to understand and very neat!
    Thank you !

    ReplyDelete
  4. Thank you for making it easier to understand each steps, the examples caught my attention and it really made me understand. Keep up the great work!(:

    ReplyDelete

 

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