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.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.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.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-sub-neg-intro/v/why-subtracting-a-negative-equivalent-to-adding-a-positive

the way i think of it is that when you **subtract** positive numbers you move to the left
, but since **negative numbers** are opposites, you would move to the right...

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

The last two examples showed us that taking away balloons (**subtracting** a
positive) or adding weights (adding a **negative**) both make the basket go down.

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 ...

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 ...