## Grade 6 - Unit 7: Rational Explorations: Numbers and Their Opposites

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bookswan Plus on June 28, 2012

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# Grade 6 - Unit 7: Rational Explorations: Numbers and Their Opposites

 Absolute valueThe distance between a number and zero on the number line. The symbol for absolute value is shown in the equation |-8| = 8.
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#### Definitions

Absolute value The distance between a number and zero on the number line. The symbol for absolute value is shown in the equation |-8| = 8.
Coordinates An ordered pair, (x, y) that locates a point in a plane.
Inequality Any mathematical sentence that contains the symbols > (greater than), < (less than), ≤ (less than or equal to), or ≥ (greater than or equal to).
Integers The set of whole numbers and their opposites (..., -3, -2, -1, 0, 1, 2, 3, ...)
Negative numbers The set of numbers less than zero.
Opposite number Two different numbers that have the same absolute value. Example: 4 and -4 are opposite numbers because both have an absolute value of 4.
Ordered Pair A pair of numbers, (x, y), that indicates the position of a point on the Cartesian Plane.
Origin The point of intersection of the vertical and horizontal axes of a Cartesian plane. The coordinates of the origin are (0, 0).
Positive Number The set of numbers greater than zero.
Rational Number The set of numbers that can be written in the form a/b where a and b are integers and b is not 0.
Sign A symbol that indicates whether a number is positive or negative. Example: In -4, the (-) sign indicates how this number is read "negative four."
x-axis The horizontal number line on the Cartesian coordinate plane.
x-coordinate The first number of an ordered pair; the position of a point relative to the vertical axis.
y-axis The vertical number line on the Cartesian coordinate plane.
y-coordinate The second number of an ordered pair; the position of a point relative to the horizontal axis.

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