Question

There are 30 desks in Mr. Smith's classroom. The desks are lined up in 5 rows. Each row has the same number of desks.
Which equations would help us find out how many desks are in each row?

• A. $5÷?=30$
• B. $5\times ?=30$
• C. $30\times ?=5$
• D. $30\times 5=?$

Answer 1

The correct option is B $5\times ?=30$

There are 5 rows.
Total number of desks = 30

We can write this as a multiplication problem.
Total number of desks = number of rows × number of desks in each row
$30=5\times ?$

Hence, number of desks in each row = total number of desks ÷ number of rows = 30 $÷$ 5

$\therefore$ option b is the correct answer.