Thực hiện phép tính:
\( \begin{array}{l}a) \, \,35 + 49 + 65 & & & & b) \, \,21.54 + 21.46 + ( - 2000) \ \c) \, \,113 + \left| { - 39} \right| + ( - 2)& & & & d) \, \,90 - \left( {{{4.5}^2} - {{7.3}^2}} \right) \end{array} \)
A.\(\begin{array}{l}{\rm{a}})\,\,149\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{b}})\,\,100\\{\rm{c}})\,\,150\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{d}})\,\,53\end{array}\)
B.\(\begin{array}{l}{\rm{a}})\,\,145\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{b}})\,\,200\\{\rm{c}})\,\,150\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{d}})\,\,50\end{array}\)
C.\(\begin{array}{l}{\rm{a}})\,\,149\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{b}})\,\, - 100\\{\rm{c}})\,\,154\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{d}})\,\,53\end{array}\)
D.\(\begin{array}{l}{\rm{a}})\,\,149\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{b}})\,\, - 100\\{\rm{c}})\,\,154\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{\rm{d}})\,\,53\end{array}\)
