Question

Solve:
1. $\begin{array}{c}678\\ -494\end{array}$
2. $\begin{array}{c}404\\ -235\end{array}$

Answer 1

We always start subtracting the numbers from the units digit and move towards left. If any the subtraction is not possible , we borrow a number from the left digit and then subtract the numbers.

1. $678$

$-494$

$\overline{184}$

2. $404$

$-235$

$\overline{169}$