Basic Math Examples

163 \cdot 5

$163 \cdot 5$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

5

$5$ by

3

$3$ . Place the ones digit

(5)

$(5)$ in the result line and carry the tens digit

(1)

$(1)$ . There is one result line for each digit in

5

$5$ .

		$1$ $1$
	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
			$5$ $5$

Step 1.2

Multiply

5

$5$ by

6

$6$ and add the carried

1

$1$ . Place the ones digit

(1)

$(1)$ in the result line and carry the tens digit

(3)

$(3)$ . There is one result line for each digit in the

5

$5$ .

	$3$ $3$	$1$ $1$
	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
		$1$ $1$	$5$ $5$

Step 1.3

Multiply

5

$5$ by

1

$1$ and add the carried

3

$3$ . Place the result in the next column in the result line. There is one result line for each digit in

5

$5$ .


	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$

Step 1.4

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

5

$5$ , then place the

5

$5$ in the result line.


	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$
			$5$ $5$

Step 1.5

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

1

$1$ , then place the

1

$1$ in the result line.


	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$
		$1$ $1$	$5$ $5$

Step 1.6

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

8

$8$ , then place the

8

$8$ in the result line.


	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$


	$1$ $1$	$6$ $6$	$3$ $3$
$\times$ $⨯$			$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$
	$8$ $8$	$1$ $1$	$5$ $5$

Step 2

The result of

163 \cdot 5

$163 \cdot 5$ is

815

$815$ .

815

$815$