Question

If Maria went to a book store and sees that the cost of one book is $\$15$. Maria wants to buy $140$ books, how much amount she needs to pay?

• A. $\$2,000$
• B. $\$2,100$
• C. $2,200$

Answer 1

The correct option is B $\$2,100$

Cost of one book $=\$15$
Total number of books Maria wants to buy $=140$
Amount that Maria needs to pay to buy $140$ books $=140\times \$15$

This product can be evaluated as:

First, we need to multiply the units digit, i.e., $5$ with $140$.

Now, we would multiply the tens digit, i.e., $1$ with $140$.


Now, we would add $700$ and $1400$ to get the answer.



The amount that Maria needs to pay to buy $140$ books would be $\$2,100$.