Algebra Examples

$15 \cdot 5$

Step 1

Multiply using long multiplication.

Tap for more steps...

Step 1.1

Multiply $5$ by $5$ . Place the ones digit $(5)$ in the result line and carry the tens digit $(2)$ . There is one result line for each digit in $5$ .

	$2$
	$1$	$5$
$⨯$		$5$
		$5$

Step 1.2

Multiply $5$ by $1$ and add the carried $2$ . Place the result in the next column in the result line. There is one result line for each digit in $5$ .


	$1$	$5$
$⨯$		$5$
	$7$	$5$

Step 1.3

Add the numbers in each column. In this case, add $5$ , then place the $5$ in the result line.


	$1$	$5$
$⨯$		$5$
	$7$	$5$
		$5$

Step 1.4

Add the numbers in each column. In this case, add $7$ , then place the $7$ in the result line.


	$1$	$5$
$⨯$		$5$
	$7$	$5$
	$7$	$5$


	$1$	$5$
$⨯$		$5$
	$7$	$5$
	$7$	$5$

Step 2

The result of $15 \cdot 5$ is $75$ .

$75$