Basic Math Examples

$5 \cdot 18$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply $8$ by $5$ . Place the ones digit $(0)$ in the result line and carry the tens digit $(4)$ . There is one result line for each digit in $18$ .


		$5$
$⨯$	$1$	$8$
	$4$	$0$

Step 1.2

Multiply $1$ by $5$ . Place the result in the next column in the result line. There is one result line for each digit in $18$ .


		$5$
$⨯$	$1$	$8$
	$4$	$0$
	$5$

Step 1.3

Add the numbers in each column. In this case, add $0 + 0$ , then place the $0$ in the result line.


		$5$
$⨯$	$1$	$8$
	$4$	$0$
	$5$
		$0$

Step 1.4

Add the numbers in each column. In this case, add $4 + 5$ , then place the $9$ in the result line.


		$5$
$⨯$	$1$	$8$
	$4$	$0$
	$5$
	$9$	$0$


		$5$
$⨯$	$1$	$8$
	$4$	$0$
	$5$
	$9$	$0$

Step 2

The result of $5 \cdot 18$ is $90$ .

$90$