Module 2 Vocabulary
Absolute value: The distance between a number and zero on the number line (e.g., |3| = 3, |−4| = 4).
Additive identity: The number zero because you can add zero to any number without changing its identity: a + 0 = a.
Additive inverse: The number you add to another number so the sum is zero. For example, –a is the additive inverse of a because a + (–a) = 0.
Associative property: The grouping in an addition or multiplication problem may change, but the sum or product will remain the same.
Commutative property: The order of an addition or multiplication problem may change, but the sum or product will remain the same.
Integer: A positive or negative whole number. The set of integers is: …–3, −2, −1, 0, 1, 2, 3…
Multiplicative identity: The number one because you can multiply any number by one without changing its identity: a • 1 = a.
Rational number: A number that can be written as a ratio or fraction. Rational numbers include positive and negative whole numbers (e.g., 4 because it can be written as 4 1), the number zero, fractions, and terminating (ending) and repeating decimals.
Variable: A symbol, such as a letter, that is a placeholder for a number. For example, x is the variable in the expression 3x.
Additive identity: The number zero because you can add zero to any number without changing its identity: a + 0 = a.
Additive inverse: The number you add to another number so the sum is zero. For example, –a is the additive inverse of a because a + (–a) = 0.
Associative property: The grouping in an addition or multiplication problem may change, but the sum or product will remain the same.
Commutative property: The order of an addition or multiplication problem may change, but the sum or product will remain the same.
Integer: A positive or negative whole number. The set of integers is: …–3, −2, −1, 0, 1, 2, 3…
Multiplicative identity: The number one because you can multiply any number by one without changing its identity: a • 1 = a.
Rational number: A number that can be written as a ratio or fraction. Rational numbers include positive and negative whole numbers (e.g., 4 because it can be written as 4 1), the number zero, fractions, and terminating (ending) and repeating decimals.
Variable: A symbol, such as a letter, that is a placeholder for a number. For example, x is the variable in the expression 3x.
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