Question

Đặt tính rồi tính:

16 + 38                 31 + 49                 77 + 23                 8 + 92

42 – 27                 80 – 56                 100 – 89               100 – 4

Answer 1

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{16}\\{38}\end{array}}\\\hline{\,\,\,\,54}\end{array}\)                       \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{31}\\{49}\end{array}}\\\hline{\,\,\,\,80}\end{array}\)                       \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{77}\\{23}\end{array}}\\\hline{\,100}\end{array}\)                       \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{\,\,\,8}\\{92}\end{array}}\\\hline{\,100}\end{array}\)

\(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{42}\\{27}\end{array}}\\\hline{\,\,\,15}\end{array}\)                       \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{80}\\{56}\end{array}}\\\hline{\,\,\,24}\end{array}\)                      \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{100}\\{\,\,89}\end{array}}\\\hline{\,\,\,\,\,11}\end{array}\)                     \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{100}\\{\,\,\,\,4}\end{array}}\\\hline{\,\,\,\,\,96}\end{array}\)