## Grade 7 - Unit 1: Operations with Rational Numbers

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bookswan Plus on June 28, 2012

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# Grade 7 - Unit 1: Operations with Rational Numbers

 Additive InverseThe sum of a number and its additive inverse is zero.
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#### Definitions

Additive Inverse The sum of a number and its additive inverse is zero.
Multiplicative Inverse Numbers are multiplicative inverses of each other if they multiply to equal the identity, 1.
Absolute Value The distance between a number and zero on the number line. The symbol for absolute value is shown in this equation: |-8| = 8
Integers The set of whole numbers and their opposites {-3, -2, -1, 0, 1, 2, 3, ...}
Long Division Standard procedure suitable for dividing simple or complex multi-digit numbers. It breaks down a division problem into a series of easier steps.
Natural Numbers The set of numbers {1, 2, 3, 4, ...}. Can also be called counting numbers.
Negative Numbers The set of numbers less than zero.
Opposite Numbers Two different numbers that have the same absolute value. Example: 4 and -4 are opposite numbers because both have an absolute value of 4.
Positive Numbers The set of numbers greater than zero.
Rational Numbers The set of numbers that can be written in the form a/b where a and b are integers and b is not 0.
Repeating Decimal A decimal number in which a digit or group of digits repeats without end.
Terminating Decimal A decimal that contains a finite number of digits.
Zero-Pair Pair of numbers whose sum is zero.

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