Basic Math Examples

$8.5 \cdot 16$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply $6$ by $0$ . Place the result in the next column in the result line. There is one result line for each digit in $16$ .


	$8$	. $5$	$0$
$⨯$		$1$	$6$
			$0$

Step 1.2

Multiply $6$ by $5$ . Place the ones digit $(0)$ in the result line and carry the tens digit $(3)$ . There is one result line for each digit in $16$ .

	$3$
	$8$	. $5$	$0$
$⨯$		$1$	$6$
		$0$	$0$

Step 1.3

Multiply $6$ by $8$ and add the carried $3$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(5)$ . There is one result line for each digit in the $16$ .


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$

Step 1.4

Multiply $1$ by $0$ . Place the result in the next column in the result line. There is one result line for each digit in $16$ .


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$
		$0$

Step 1.5

Multiply $1$ by $5$ . Place the result in the next column in the result line. There is one result line for each digit in $16$ .


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$
	$5$	$0$

Step 1.6

Multiply $1$ by $8$ . Place the result in the next column in the result line. There is one result line for each digit in $16$ .


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$
$8$	$5$	$0$

Step 1.7

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


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$
$8$	$5$	$0$
			$0$

Step 1.8

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


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$
$8$	$5$	$0$
		$0$	$0$

Step 1.9

Add the numbers in each column. In this case, add $1 + 5$ , then place the $6$ in the result line.


	$8$	. $5$	$0$
$⨯$		$1$	$6$
$5$	$1$	$0$	$0$
$8$	$5$	$0$
	$6$	$0$	$0$

Step 1.10

Add the numbers in each column. In this case, add $5 + 8$ , then place the $3$ in the result line and carry the $1$ .


		$8$	. $5$	$0$
	$⨯$		$1$	$6$
	$5$	$1$	$0$	$0$
	$8$	$5$	$0$
$1$	$3$	$6$	$0$	$0$


		$8$	. $5$	$0$
	$⨯$		$1$	$6$
	$5$	$1$	$0$	$0$
	$8$	$5$	$0$
$1$	$3$	$6$	$0$	$0$

Step 2

To find the number of decimal places needed in the answer, add the number of decimal places in the multiplier and multiplicand. In this case, there is a total of $2$ , so the answer must have $2$ decimal places as well.

$136$