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en.wikipedia.org/wiki/Integer

An integer is a number that can be written without a fractional component. For example, 21, 4, ... Some authors use ℤ* for non-zero integers, others use it for non-negative integers, or for {–1, 1}. Additionally, ℤp is used to denote either the set of ...

mathworld.wolfram.com/NegativeInteger.html

A negative integer is one of the integers ..., -4 , -3 , -2 , -1 obtained by negating the positive integers. The negative integers are commonly denoted Z^- .

study.com/academy/lesson/negative-integers-definition-rules-examples.html

This lesson will be covering the world of negative integers. What is a negative integer? How do they work? Also, we will be looking at real...

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

Let us think about numbers as balloons (positive) and weights (negative): ... Now let's see what adding and subtracting negative numbers looks like: .... Number Line Using The Number Line Whole Numbers and Integers Multiplying Negatives  ...

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/cc-seventh-grade-math/cc-7th-negative-numbers-add-and-subtract/cc-7th-add-sub-negative-numbers-with-variables/e/integer-addition-and-subtraction-with-substitution

Practice plugging in values to evaluate negative number addition and subtraction expressions.

www.mathleague.com/index.php/about-the-math-league/mathreference?id=82

Positive integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5, ... . Negative integers are all the ...

www.mathgoodies.com/lessons/vol5/intro_integers

Whole numbers less than zero are called negative integers. These numbers are to the left of zero on the number line. The integer zero is neutral. It is neither ...

web.cerritos.edu/dford/SitePages/Math_40/Math40Lesson6.pdf

Positive integers are all the whole numbers greater than zero: 1, 2, 3, 4, 5, . ... For each positive integer, there is a negative integer, and these integers are called.