Using this flowchart will help you to add and subtract positive and negative integers. This chart is intended to be utilized after instruction with manipulatives and/or number lines.










Put the middle + or  with the number that does not have a + or .
example:
25 +10
 YES

Is there only one number without a + or ?
example:
25 + 10=
 NO

Are there two negative signs?
example:
25  10
 NO

Is there a positive and negative sign?
25 + 10
 YES

Subtract the least (smallest) number from the greater (biggest) number.
2510=15





YES





Subtract the least (smallest) number from the greater (bigger) number.
25  10 = 15

 

Add the numbers together.
example:
25 + 10 = 35

 

Put a negative sign with your answer IF THE GREATER (BIGGER)
NUMBER HAD A NEGATIVE SIGN.










Put a negative sign with your answer IF THE GREATER (BIGGER)
NUMBER HAD A NEGATIVE SIGN.
example:
15 since the greater (bigger) number has a negative  sign.

 

Write a negative sign to your answer.
example:
35

 
 










 

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