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...Pltw course for mathmatics crosswalk group participants math practices not apparent in this common core state standards mathematics unit high school number quantity the real system extend properties of exponents to rational explain how definition meaning follows from extending integer those values allowing a notation radicals terms example we define be cube root because want hold so must equal rewrite expressions involving and using use irrational numbers why sum or product two is that an nonzero quantities reason quantitatively units solve problems as way understand guide solution multistep choose interpret consistently formulas scale origin graphs data displays appropriate purpose descriptive modeling level accuracy limitations on measurement when reporting complex perform arithmetic operations with know there i such every has form bi b relation commutative associative distributive add subtract multiply find conjugate conjugates moduli quotients represent their plane rectangular pola...