Resta en vertical: 4 dígitos con reagrupación adicional

$\begin{aligned} &6210 \\ -& \\ &4242 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

1968

$\begin{aligned} &5421 \\ -& \\ &3675 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

1746

$\begin{aligned} &4176 \\ -& \\ &2197 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

1979

$\begin{aligned} &7015 \\ -& \\ &4246 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

2769

$\begin{aligned} &8314 \\ -& \\ &5278 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

3036

$\begin{aligned} &9217 \\ -& \\ &5429 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

3788

$\begin{aligned} &8541 \\ -& \\ &3562 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

4979

$\begin{aligned} &7463 \\ -& \\ &6674 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

789

$\begin{aligned} &2457 \\ -& \\ &1658 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

799

$\begin{aligned} &3732 \\ -& \\ &2865 \\ &\underline{\phantom{776}} & \\ \end{aligned}$

867