Phép cộng số thập phân có những tính chất nào dưới đây?

A. $\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{1\,8\,,\,2\,5\,3}\\{\,\,\,\,\,\,\,\,\,\,\,\,\,7,7}\end{array}}\\\hline{}\end{array}$           

B. $\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{\,\,\, 1\,\,8\,,\,2\,5\,3}\\{7,7\,\,\,\,\,\,\,\,\,}\end{array}}\\\hline{}\end{array}$

C. $\begin{array}{*{20}{c}}{ + \,\,\begin{array}{*{20}{c}}{1\,\,8\,,\,2\,5\,3}\\{\,\,\,7,7\,\,\,\,\,\,\,}\end{array}}\\\hline{}\end{array}$

D. $\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{1\,8\,,\,2\,5\,3}\\{\,\,\,\,\,\,\, 7,7}\end{array}}\\\hline{}\end{array}$

A. \( 58,98\)

B. \(59,88\)

C. \( 4269,36\)

D. \(5988 \)

A. \(44,39\)

B. \(55,46\)

C. \(60,23\)

D. \(107,93\)

A. \(x = 52,98\)

B. \(x = 84,3\)

C. \(x = 8,43\)

D. \(x = 12,48\)