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abscissa

the value of a coordinate on the horizontal (x) axis

absolute value

the positive number that describes the distance on a number line of the graph of the number from zero

acute angle

an angle whose value is between 0 and 90 degrees

acute triangle

a triangle in which all the angles are acute

addend

a number that is added to another number

addition

the operation of combining two numbers to form a sum

additive inverse

for any nonzero real number, the opposite of the number

additive property of inequality

for any real numbers a, b, and c, if a is greater then b,
then a + c is greater than b + c and c + a is greater than c + b

algebraic expression

constants and/or variables combined using the arithmetic operators +, -, ×, or ÷

algebraic phrase

a meaningful arrangement of numbers and variables

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