Đề bài

Tìm: \(\left| { - {\rm{ }}2{\rm{ }}022} \right|;{\rm{ }}\left| {\sqrt {312} } \right|;{\rm{ }}\left| { - \sqrt {5,4} } \right|;{\rm{ }}\left| {\dfrac{{ - 273}}{3}} \right|;{\rm{ }}\left| { - 20,21} \right|\).

Lời giải chi tiết

\(\left| { - {\rm{ }}2{\rm{ }}022} \right| =  - {\rm{ }}( - {\rm{ }}2{\rm{ }}022) = 2{\rm{ }}022\);\(\left| {\sqrt {312} } \right| = \sqrt {312}\);\(\left| { - \sqrt {5,4} } \right| =  - {\rm{ }}\left( { - \sqrt {5,4} } \right) = \sqrt {5,4} \);\(\left| {\dfrac{{ - 273}}{3}} \right| =  - \left( {\dfrac{{ - 273}}{3}} \right) = \dfrac{{273}}{3}\);

\(\left| { - 20,21} \right| =  - {\rm{ }}( - 20,21) = 20,21\).