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Positive/Negative Integer Rules

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Positive and Negative Integer Rules, a selection of answers from the Dr. Math archives.

Negative Number Rules
When do two negative numbers equal a positive?

Manipulating Positive and Negative Numbers
Could you explain the rules for adding, subtracting, multiplying, and dividing positive and negative numbers?

Signs: Rules, Number Line
What is (-) - (+) = ? or (+) + (-) = ?

Subtracting Numbers by Walking a Number Line
For example: -8.1- -6.9 = -1.2 and -9.9- -11.1 = 1.2. All the numbers are negative, so why is the answer to the first problem negative but the second isn't?

And see:

Negative x Negative = Positive - Dr. Math FAQ
Why does a negative times a negative equal a positive? Does this ever happen in the real world?

Return to
Middle School Algebra
Middle School Negative Numbers
High School Algebra
High School Negative Numbers
Index of Selected Answers to Common Questions

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