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.
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Put the middle + or - with the number that does not have a + or -.
example:
-25 +10
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YES
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Is there only one number without a + or -?
example:
-25 + 10=
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NO
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Are there two negative signs?
example:
-25 - -10
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NO
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Is there a positive and negative sign?
-25 + 10
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YES
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Subtract the least (smallest) number from the greater (biggest) number.
25-10=15
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YES
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Subtract the least (smallest) number from the greater (bigger) number.
25 - 10 = 15
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Add the numbers together.
example:
25 + 10 = 35
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Put a negative sign with your answer IF THE GREATER (BIGGER)
NUMBER HAD A NEGATIVE SIGN.
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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.
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Write a negative sign to your answer.
example:
-35
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+ AND - POSITIVE/NEGATIVE INTEGERS
