Question

Đặt tính rồi tính (theo mẫu): 

97 + 3                                 91 + 9

92 + 8                                 98 +2

b) Tính nhẩm:

99 + 1                                 96 + 4

94 + 6                                 95 + 5   

Answer 1

Answer 2

b)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{99}\\{\,\,1}\end{array}}\\\hline{\,100}\end{array}\)                                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{96}\\{\,\,4}\end{array}}\\\hline{\,100}\end{array}\)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{94}\\{\,\,6}\end{array}}\\\hline{\,100}\end{array}\)                                      \(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{95}\\{\,\,5}\end{array}}\\\hline{\,100}\end{array}\)