Pre-Algebra Examples

$16 \cdot 4$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply $4$ by $6$ . Place the ones digit $(4)$ in the result line and carry the tens digit $(2)$ . There is one result line for each digit in $4$ .

	$2$
	$1$	$6$
$⨯$		$4$
		$4$

Step 1.2

Multiply $4$ 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 $4$ .


	$1$	$6$
$⨯$		$4$
	$6$	$4$

Step 1.3

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


	$1$	$6$
$⨯$		$4$
	$6$	$4$
		$4$

Step 1.4

Add the numbers in each column. In this case, add $6$ , then place the $6$ in the result line.


	$1$	$6$
$⨯$		$4$
	$6$	$4$
	$6$	$4$


	$1$	$6$
$⨯$		$4$
	$6$	$4$
	$6$	$4$

Step 2

The result of $16 \cdot 4$ is $64$ .

$64$