\(\displaystyle -0.\overset{\bullet }{\mathop{3}}\,\overset{\bullet }{\mathop{1}}\,\)， \(\displaystyle \frac{2}{3}\)，\(\displaystyle -\sqrt[3]{27}\)，3.14，\(\displaystyle \sqrt{7}\)，0.4829，1.020020002...，\(\displaystyle -\sqrt[3]{9}\)，\(\displaystyle -\sqrt[3]{{0.5}}\)，\(\displaystyle -\sqrt{{81}}\)，\(\displaystyle \frac{\pi }{2}\)
（1）、\(\displaystyle -\sqrt{6}\)
解： \(\displaystyle -\sqrt{6}\)的相反数是\(\displaystyle \sqrt{6}\)；\(\displaystyle \left| {-\sqrt{6}} \right|=\sqrt{6}\)
（2）、π-3.14
解：π-3.14的相反数是3.14-π；\(\displaystyle \left| {\pi -3.14} \right|=\pi -3.14\)
（3）、\(\displaystyle 1-\sqrt[3]{2}\)
解：\(\displaystyle 1-\sqrt[3]{2}\)的相反数\(\displaystyle\sqrt[3]{2}-1 \)；\(\displaystyle \left| {1-\sqrt[3]{2}} \right|=\sqrt[3]{2}-1\)
（4）、\(\displaystyle \sqrt{3}-2\)
解：\(\displaystyle \sqrt{3}-2\)的相反数\(\displaystyle 2-\sqrt{3}\)；\(\displaystyle \left| {\sqrt{3}-2} \right|=2-\sqrt{3}\)
