Basic Math Examples

$15 \cdot 10$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

$0$ by

$5$ . Place the result in the next column in the result line. There is one result line for each digit in

$10$ .


	$1$	$5$
$⨯$	$1$	$0$
		$0$

Step 1.2

Multiply

$0$ by

$1$ . Place the result in the next column in the result line. There is one result line for each digit in

$10$ .


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$

Step 1.3

Multiply

$1$ by

$5$ . Place the result in the next column in the result line. There is one result line for each digit in

$10$ .


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$
	$5$

Step 1.4

Multiply

$1$ by

$1$ . Place the result in the next column in the result line. There is one result line for each digit in

$10$ .


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$
$1$	$5$

Step 1.5

Add the numbers in each column. In this case, add

$0 + 0$ , then place the

$0$ in the result line.


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$
$1$	$5$
		$0$

Step 1.6

Add the numbers in each column. In this case, add

$0 + 5$ , then place the

$5$ in the result line.


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$
$1$	$5$
	$5$	$0$

Step 1.7

Add the numbers in each column. In this case, add

$0 + 1$ , then place the

$1$ in the result line.


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$
$1$	$5$
$1$	$5$	$0$


	$1$	$5$
$⨯$	$1$	$0$
	$0$	$0$
$1$	$5$
$1$	$5$	$0$

Step 2

The result of

$15 \cdot 10$ is

$150$ .

$150$