Question

a) Đặt tính rồi tính: 

b) Tính nhẩm: 

Answer 1

\(\begin{array}{*{20}{c}}{a)\,\,}\\{}\\{}\end{array}\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{64}\\{36}\end{array}}\\\hline{\,\,100}\end{array}\)                                \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{79}\\{21}\end{array}}\\\hline{\,100}\end{array}\)

       \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{52}\\{48}\end{array}}\\\hline{\,\,100}\end{array}\)                                 \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{34}\\{66}\end{array}}\\\hline{\,100}\end{array}\)

Answer 2

b,