Two numbers whose sum is 0 are additive inverses of one another.

The distance of a number from 0. Since absolute value measures distance, the value is always positive. The absolute value symbol is a pair of vertical lines: | |. For example, | -4| = 4 is read, “The absolute value of -4 equals 4.”

The set of whole numbers and their opposites and zero. Also, a number expressible in the form a or –a for some whole number a.

the mathematical method for dividing large numbers into smaller groups or parts. It helps to break down a problem into simple and easy steps

the positive integers (whole numbers) 1, 2, 3, etc., and sometimes zero as well.

A pair of numbers whose sum is zero. In the number line image below, numbers connected with a colored bracket are zero pairs. Visually, zero pairs can also be represented with two-color counters as seen below the number line.

a number that is less than zero

A number with the same absolute value as a given number, but with a different sign.

A number expressible in the form a/b or -a/b for some form a/b The rational numbers include the integers. The image below shows some examples of rational numbers.

A number whose decimal representation eventually becomes periodic (i.e., the same sequence of digits repeats indefinitely. The repeating portion of a decimal expansion is conventionally denoted with a vinculum ( ‾ ). For example, 1 3 = 0.3333 … = 0. 3

A decimal with a finite number of digits. Also, if a decimal’s repeating digit is zero, the decimal is called a terminating decimal. Examples of terminating decimals can be seen below.

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Unit 1 vocab math

Math Vocabulary

Term	Definition
Additive Inverse	Two numbers whose sum is 0 are additive inverses of one another.
Multiplicative Inverse	Two numbers whose product is 1 are multiplicative inverses of one another.
Absolute Value	The distance of a number from 0. Since absolute value measures distance, the value is always positive. The absolute value symbol is a pair of vertical lines: \| \|. For example, \| -4\| = 4 is read, “The absolute value of -4 equals 4.”
Integers	The set of whole numbers and their opposites and zero. Also, a number expressible in the form a or –a for some whole number a.
Long Division	the mathematical method for dividing large numbers into smaller groups or parts. It helps to break down a problem into simple and easy steps
Natural Numbers	the positive integers (whole numbers) 1, 2, 3, etc., and sometimes zero as well.
Zero Pair	A pair of numbers whose sum is zero. In the number line image below, numbers connected with a colored bracket are zero pairs. Visually, zero pairs can also be represented with two-color counters as seen below the number line.
Negative Numbers	a number that is less than zero
Opposite Numbers	A number with the same absolute value as a given number, but with a different sign.
Positive Numbers	any number greater than zero
Rational Numbers	A number expressible in the form a/b or -a/b for some form a/b The rational numbers include the integers. The image below shows some examples of rational numbers.
Repeating Decimal	A number whose decimal representation eventually becomes periodic (i.e., the same sequence of digits repeats indefinitely. The repeating portion of a decimal expansion is conventionally denoted with a vinculum ( ‾ ). For example, 1 3 = 0.3333 … = 0. 3
Terminating Decimal	A decimal with a finite number of digits. Also, if a decimal’s repeating digit is zero, the decimal is called a terminating decimal. Examples of terminating decimals can be seen below.

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