Tính phép tính: a) (− 203) − 72 + 203 − 114 ;

a) \(\left( { - 203} \right) - 72 + 203 - 114\)

\( = \left( { - 203 + 203} \right) - \left( {72 + 114} \right)\)

\( = 0 - 186\)

\( =  - 186\).

b) \[8.\left( { - 84} \right).\left( { - 125} \right)\]

\( = \left( { - 125.8} \right).\left( { - 84} \right)\)

\( = \left( { - 1000} \right).\left( { - 84} \right)\)

\( = 84\,\,000\).

c) \[58.19 + 58.\left( { - 119} \right)\]

\( = 58.\left( { - 119 + 19} \right)\)

\( = 58.\left( { - 100} \right)\)

\( =  - 5\,\,800\).