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Is the notation $\Bbb{R}^+$ for non-negative reals, and $\Bbb{R}^{++}$ for positive reals, standard? - Mathematics Stack Exchange
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2.1 The Real Number Line Positive Numbers Origin Negative Numbers Positive numbers: Negative numbers: Zero: - ppt download
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Exponents 8 th Grade Pre-Algebra. Real Numbers Rational Numbers: Any number that can be written as a fraction Integers Positive and negative whole numbers. - ppt download
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