Question

1,000,000,000×40,000

Answer 1

1,000,000,000 x 40,000

This can be made easy if the numbers are expressed in standard form

$\begin{gathered} 1,000,000,000=1X10^9 \\ \end{gathered}$

$40,000=4X10^4$

=>

$1,000,000,000X40,000=1X10^9X4X10^4$

=>

$\begin{gathered} 4X10^{9\text{ + 4}} \\ \\ 4X10^{13} \\ \\ 4X10^{13}\text{ = 40, 000, 000, 000, 000} \\ \end{gathered}$