Question

[Buddy]

Đặt tính rồi tính: 

a) 25 + 39                  46 + 46                   64 + 26                   75 + 15

b) 17 + 7                    89 + 2                     58 + 2                     67 + 3

Answer 1

[Hà Quang Minh]

\(\begin{array}{*{20}{c}}{a)\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{25}\\{39}\end{array}}\\\hline{\,\,\,64}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{46}\\{46}\end{array}}\\\hline{\,\,\,92}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{64}\\{26}\end{array}}\\\hline{\,\,\,90}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{75}\\{15}\end{array}}\\\hline{\,\,\,90}\end{array}\)

\(\begin{array}{*{20}{c}}{b)\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{17}\\{\,7}\end{array}}\\\hline{\,\,\,24}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{89}\\{\,\,2}\end{array}}\\\hline{\,\,\,91}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{58}\\{\,\,\,2}\end{array}}\\\hline{\,\,\,60}\end{array}\)                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{67}\\{\,\,3}\end{array}}\\\hline{\,\,\,70}\end{array}\)