Question

Thomas enrolls for a professional swimming class for $120$ days. The training charge is $\$320$ per day. The total amount Thomas spends is $\$$.

• A. $348,00$
• B. $384,00$
• C. $340,80$

Answer 1

The correct option is B $384,00$

Thomas enrolls for $120$ days swimming class.
The training charge $=320\$$/day
$\therefore$ Thomas spends the total amount on swimming class is $(320\times 120)\$$.

To get the value of $320\times 120$, we follow our new long multiplication method as shown below.


$\bullet$ First, we multiply $320$ with $0$, and write down the numbers in the first row.

$\bullet$ Then in the next step, we multiply $320$ with $2$, and write down the numbers in second row by leaving one gap (denoted by $0$) to the right.

$\bullet$ Similarly, we multiply $320$ with $1$, and write down the numbers in third row by leaving two gaps (denoted by $0$s) to the right.

$\bullet$ Finally, we add the values, and write down in the fourth row to get the final answer, which is $384,00$.

$\therefore$ Thomas spends in-total $384,00\$$ on his swimming classes.