Question

Add:
$$\begin{gathered} 31458875 \\ 49873928 \\ +80394669 \\ \_\_\_\_\_\_\_\_\_\_\_ \end{gathered}$$

Answer 1

Add columnwise from right and carry wherever necessary in the adjacent left column.

$$\begin{gathered} 1121212 \\ .................. \\ 31458875 \\ 49873928 \\ +80394669 \\ \_\_\_\_\_\_\_\_\_\_\_ \\ 161727472 \end{gathered}$$ Here, the top row above dotted line, depicts carry.

Thus, the sum is $16,17,27,472$.