Question

In the scale of eight subtract $371532$ from $530225$, and multiply the difference by$27$

Answer 1

$530225$
$371532$
---------------
$136473$
$136473$
$27$
_________
$1226235$
$275166$
_________
$4200115$
After the first figure of the subtraction, since we cannot take $3$ from $2$ we add $8$; thus we have to take $3$ from ten, which leaves $7$; then $6$ from ten, which leaves $4$; then $2$ from eight which leaves $6$; and so on.
Again, in multiplying by $7$, we have
$3\times 7=$ twenty one $=2\times 8+5$;
we therefore put down $5$ carry $2$.
Next $7\times 7+2=$ fifty one $=6\times 8+3$;
put down $3$ and carry $6$; and so on, until the multiplication is completed
In addition,
$3+6=$ nine $=1\times 8+1$;
we therefore put down $1$ and carry $1$.
Similarly $2+6+1=$ nine $=1\times 8+1$;
and $6+1+1=$ eight $=1\times 8+0$;
and so on.