Question

Using brackets solve $9\times 105$ .

Answer 1

Simplification:

We have $9\times 105$

We can also write the above expression as

$\begin{array}{rcl}9\times 105& =& 9\times \left(100+5\right)\\ & =& 9\times 100+9\times 5\left\{\text{Since a}\left(b+c\right)=a\times b+a\times c\right\}\\ & =& 900+45\\ & =& 945\end{array}$

Hence $9\times 105=945$