Question

Each of $8$ bookstores in downtown ordered $425$ comic books from a book dealer. The total number of comic books the dealer needs to deliver is .

• A. $3,040$
• B. $3,004$
• C. $3,400$

Answer 1

The correct option is C $3,400$

Number of comic books ordered by $1$ bookstore $=425$
Number of bookstores ordered comic books $=8$

$\therefore$ Total number of comic books ordered $=425\times 8$

To solve $425\times 8$, we follow the below steps:

$\bullet$ First we write the bigger number at the top and smaller number just below of it with a proper alignment of one's place.


$\bullet$ We first multiply $8$ with $5$, which is $\underset{–}{4}0$, where $4$ is carrying over to the next multiplication, $8\times 2$. So, the next number, we get $(8\times 2)+4=16+4=\underset{–}{2}0$, where $2$ is carrying over to the next multiplication, $8\times 4$. Hence, the next number would be $(8\times 4)+2=32+2=34$.



$\therefore 425\times 8=3,400$.

Hence, the total number of comic books the dealer needs to deliver is $3,400$.