Giải bài 5 trang 148 - SGK Toán lớp 3

a)

$\dfrac{\begin{align} & \,\,\,3254 \\ & + \\ & \,\,\, 2473 \\ \end{align}}{\,\,\,\,5727}$                             $\dfrac{\begin{align} & \,\,\,8326 \\ & - \\ & \,\,\, 4916 \\ \end{align}}{\,\,\,\,3410}$

b)

$\left. \begin{align} & \begin{matrix} 8460 \\ 24 \,\,\,\,\, \\ \end{matrix} \\ & \,\,\,\,06 \\ & \,\,\,\,\,\,\,00 \\ & \,\,\,\,\,\,\,\,\,\,0 \end{align} \right|\begin{matrix} \dfrac{6}{1410} \\ {} \\ {} \\ {} \end{matrix}$                $\dfrac{\begin{align} & \,\,1326 \\ & \times \\ & \,\,\,\,\,\,\,\,\,\,3 \\ \end{align}}{{\bf \,\,3978 }}$