Đề bài

Tính:

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{17}\\{24}\end{array}}\\\hline{\,\,}\end{array}\)                                 \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{37}\\{36}\end{array}}\\\hline{}\end{array}\)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{42}\\{48}\end{array}}\\\hline{}\end{array}\)                                 \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{59}\\{25}\end{array}}\\\hline{}\end{array}\)

Phương pháp giải

Cộng lần lượt từ phải sang trái. 

Lời giải của GV Loigiaihay.com

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{17}\\{24}\end{array}}\\\hline{\,\,\,\,41}\end{array}\)                                       \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{37}\\{36}\end{array}}\\\hline{\,\,\,\,73}\end{array}\)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{42}\\{48}\end{array}}\\\hline{\,\,\,\,90}\end{array}\)                                       \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{59}\\{25}\end{array}}\\\hline{\,\,\,\,84}\end{array}\)