Question

The value of $3\times 4\times {10}^3$ is

Answer 1

$3\times 4\times {10}^3$
$=(3\times 4)\times {10}^3$
$=12\times {10}^3$
$=12.0\times 1,000$

We know that multiplying $12.0$ by $1,000$ is responsible to move the decimal point $3$ units to the right, i.e., $12.0\times 1,000=12,000.0=12,000$.

$\therefore \underset{–}{3\times 4\times {10}^3=12,000}$