1) \(27 + 12 + \left( { - 17} \right) + \left( { - 12} \right)\)

\(\begin{array}{l} = \left[ {27 + \left( { - 17} \right)} \right] + \left[ {12 + \left( { - 12} \right)} \right]\\ = 10 + 0 = 10\end{array}\)

2) \(58.24 - 58.140 + 58.16\)

\(\begin{array}{l} = 58\left( {24{\rm{ }} - {\rm{ }}140{\rm{ }} + 16} \right)\\ = 58.\left( { - 100} \right) = - 5\,800\end{array}\)

3) \( - 564-\left( {324 - 564-224} \right)\)

\(\begin{array}{l}{\rm{ = }} - 564-324 + 564 + 224\\ = \left( { - 564 + 564} \right) + \left( {-324 + 224} \right)\\ = 0 + \left( {-100} \right) = --100\end{array}\)

4) \({2^3}{.3^2} + {\left( { - 7} \right)^2} - {2022^0}\)

\(\begin{array}{l} = 8.9 + 49 - 1\\ = 72 + 49 - 1 = 120\end{array}\)

Trong các chữ cái sau: M, E, F, H thì chữ cái có tâm đối xứng là