Giải bài 1 trang 156 - SGK Toán lớp 3
Tính (theo mẫu):
a) \(\dfrac{\begin{align} & \,\,\,63548 \\ & + \\ & \,\,\,19256 \\ \end{align}}{\,\,\,\,82804} \) \(\dfrac{\begin{align} & \,\,\,52379 \\ & + \\ & \,\,\,38421 \\ \end{align}}{\,\,\,\,} \)
\(\dfrac{\begin{align} & \,\,\,29107 \\ & + \\ & \,\,\,34693 \\ \end{align}}{\,\,\,\,} \) \(\dfrac{\begin{align} & \,\,\,93959 \\ & + \\ & \,\,\,\,\,\,6041 \\ \end{align}}{\,\,\,\,} \)
b) \(\dfrac{\begin{align} &23154 \\ + & 31208\\ &17209 \\ \end{align}}{\,\,\,\,\,71391} \) \(\dfrac{\begin{align} &46215 \\ + & \,\,4072\\ & 19360 \\ \end{align}}{\,\,\,\,\,} \)
\(\dfrac{\begin{align} &53028 \\ + & 18436\\ & \,\,\,9127 \\ \end{align}}{\,\,\,\,\,} \) \(\dfrac{\begin{align} &21357 \\ + & \,\,4208\\ & \,\,\,\,\,919 \\ \end{align}}{\,\,\,\,\,} \)
Hướng dẫn:
Thực hiện phép tính lần lượt từ phải sang trái.
Bài giải:
a) \(\dfrac{\begin{align} & \,\,\,63548 \\ & + \\ & \,\,\,19256 \\ \end{align}}{\,\,\,\,82804} \) \(\dfrac{\begin{align} & \,\,\,52379 \\ & + \\ & \,\,\,38421 \\ \end{align}}{\,\,\,\,90800} \)
\(\dfrac{\begin{align} & \,\,\,29107 \\ & + \\ & \,\,\,34693 \\ \end{align}}{\,\,\,\,63800} \) \(\dfrac{\begin{align} & \,\,\,93959 \\ & + \\ & \,\,\,\,\,\,6041 \\ \end{align}}{\,\,\,100000} \)
b) \(\dfrac{\begin{align} &23154 \\ + & 31208\\ &17209 \\ \end{align}}{\,\,\,\,\,71391} \) \(\dfrac{\begin{align} &46215 \\ + & \,\,4072\\ & 19360 \\ \end{align}}{\,\,\,\,\,69647} \)
\(\dfrac{\begin{align} &53028 \\ + & 18436\\ & \,\,\,9127 \\ \end{align}}{\,\,\,\,\,\,80591} \) \(\dfrac{\begin{align} &21357 \\ + & \,\,4208\\ & \,\,\,\,\,919 \\ \end{align}}{\,\,\,\,\,26484} \)