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en.wikipedia.org/wiki/Negative_number

In general, subtraction of a positive number yields the same result as the addition of a negative number of equal magnitude. Thus.

www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-sub-neg-intro/v/adding-and-subtracting-negative-number-examples

Learn how to add and subtract negative numbers. The problems solved in this video are 2 - 3 = -1 and -2 - 3 = -5 and -2 + 3 = 1 and 2 - (-3) = 5 and -2 - (-3).

www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-sub-neg-intro/e/adding_and_subtracting_negative_numbers

Practice subtracting positive and negative single-digit numbers.

www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-sub-neg-intro/a/subtracting-negative-numbers-review

Review the basic of subtracting negative numbers and try some practice problems.

www.wyzant.com/resources/lessons/math/elementary_math/positive_and_negative_numbers/subtracting_positive_and_negative_numbers

Subtracting positive and negative numbers can also be tricky because there are several rules to remember and follow. Rule 1: Subtracting a positive number ...

www.mathsisfun.com/positive-negative-integers.html

add subtract -- goes up. And you can take away weights (you are subtracting negative values). the basket gets pulled upwards (positive) ...

www.purplemath.com/modules/negative2.htm

When you'd subtracted a positive number, you'd moved to the left. Now, if you're adding a negative, you can regard this is pretty much the same as when you ...

.ask.com/youtube?q=Subtracting+Negative+Numbers&v=xBJuf6Yvm3I
Sep 10, 2013 ... Learn how to add and subtract negative numbers in this step by step video. To see all my math videos visit my channel page ...

www.bbc.co.uk/bitesize/ks3/maths/number/negative_numbers/revision/3

Adding and subtracting. To add and subtract numbers always begin counting from zero. When dealing with positive numbers count to the right. When dealing ...

.ask.com/youtube?q=Subtracting+Negative+Numbers&v=YpC-KbEAE7I
Apr 17, 2011 ... Subtracting a Negative Number from a Positive Number - Algebra Series: Learn how to subtract a negative number from a positive number.