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# What Is an Integer in Math?

**Integers are positive and negative whole numbers, including zero.** As with whole numbers, integers do not include fractions or decimals. Integers are a part of the numerical classification system in mathematics.

Adding, subtracting and multiplying two integers always results in another integer. The ratio, or division, of two integers is a rational number. A number line is a way to graph and to add and subtract integers by counting forward and backward. Integers are the second set in the hierarchy of numbers, which includes the subset of all natural numbers as integers. Real numbers and rational numbers include all integers.

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## What Is a Very Hard Math Equation?

A: An extremely difficult math equation is the Jacobi-Madden equation, a4 + b4 + c4 + d4 = (a + b + c + d)4 where variables a, b, c and d can be any positive ... Full Answer >Filed Under: -
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## What Is a Prime Number in Math?

A: A prime number in math is an integer greater than 1 that is evenly divisible by only 1 and the number itself. One is not considered a prime number, because... Full Answer >Filed Under: -
Q:
## What Are "friendly Numbers" in Math?

A: Friendly numbers are individual numbers that make up part of what is known as a friendly pair. Friendly numbers always come in sets of two, and they are kn... Full Answer >Filed Under: -
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## What Is the First Topic You Should Learn in Math?

A: According to Common Core standards, the first concepts a student should learn in math are the names of the numbers and the sequence in which to count them.... Full Answer >Filed Under: