$-7, 0.32, \frac{1}{3}, 3.1\dot{4}, 0$
$\sqrt{8}, \sqrt{\frac{1}{2}}, \sqrt[3]{9}, 0.010010001···, -\frac{π}{2}$
$0.32, \frac{1}{3}, 3.1\dot{4}, \sqrt{8}, \sqrt{\frac{1}{2}}, \sqrt[3]{9}, 0.010010001···$
$-7, 0.32, \frac{1}{3}, 3.1\dot{4}, 0, \sqrt{8}, \sqrt{\frac{1}{2}}, \sqrt[3]{9}, 0.010010001···, -\frac{π}{2}$
(1)无限不循环小数才是无理数; (2)带根号可能是未化简; (4)不能除尽但是循环的分数是有理数; (3)(5)正确。
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