Question

Without actual computations find the quotient when the differences of $952$ abd $259$ is divided by $9$

Answer 1

$952-259=693$

we can write $693=630+63=9\times 70+9\times 7=9(70+7)=9\times 77$

Now, $\frac{693}{9}=\frac{9\times 77}{9}=77$