Basic Math Examples

19.99 \cdot 12

$19.99 \cdot 12$

Step 1

Multiply using long multiplication.

Tap for more steps...

Step 1.1

Multiply

2

$2$ by

9

$9$ . Place the ones digit

(8)

$(8)$ in the result line and carry the tens digit

(1)

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

12

$12$ .

			$1$ $1$
	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
				$8$ $8$

Step 1.2

Multiply

2

$2$ by

9

$9$ and add the carried

1

$1$ . Place the ones digit

(9)

$(9)$ in the result line and carry the tens digit

(1)

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

12

$12$ .

		$1$ $1$	$1$ $1$
	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
			$9$ $9$	$8$ $8$

Step 1.3

Multiply

2

$2$ by

9

$9$ and add the carried

1

$1$ . Place the ones digit

(9)

$(9)$ in the result line and carry the tens digit

(1)

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

12

$12$ .

	$1$ $1$	$1$ $1$	$1$ $1$
	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
		$9$ $9$	$9$ $9$	$8$ $8$

Step 1.4

Multiply

2

$2$ by

1

$1$ and add the carried

1

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

12

$12$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$

Step 1.5

Multiply

1

$1$ by

9

$9$ . Place the result in the next column in the result line. There is one result line for each digit in

12

$12$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
			$9$ $9$

Step 1.6

Multiply

1

$1$ by

9

$9$ . Place the result in the next column in the result line. There is one result line for each digit in

12

$12$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
		$9$ $9$	$9$ $9$

Step 1.7

Multiply

1

$1$ by

9

$9$ . Place the result in the next column in the result line. There is one result line for each digit in

12

$12$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
	$9$ $9$	$9$ $9$	$9$ $9$

Step 1.8

Multiply

1

$1$ by

1

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

12

$12$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$

Step 1.9

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

8 + 0

$8 + 0$ , then place the

8

$8$ in the result line.


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$
				$8$ $8$

Step 1.10

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

9 + 9

$9 + 9$ , then place the

8

$8$ in the result line and carry the

1

$1$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$
			$8$ $8$	$8$ $8$

Step 1.11

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

9 + 9 + 1

$9 + 9 + 1$ , then place the

9

$9$ in the result line and carry the

1

$1$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$
		$9$ $9$	$8$ $8$	$8$ $8$

Step 1.12

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

3 + 9 + 1

$3 + 9 + 1$ , then place the

3

$3$ in the result line and carry the

1

$1$ .


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$
	$3$ $3$	$9$ $9$	$8$ $8$	$8$ $8$

Step 1.13

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

0 + 1 + 1

$0 + 1 + 1$ , then place the

2

$2$ in the result line.


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$
$2$ $2$	$3$ $3$	$9$ $9$	$8$ $8$	$8$ $8$


	$1$ $1$	$9$ $9$	. $9$ $9$	$9$ $9$
$⨯$ $⨯$			$1$ $1$	$2$ $2$
	$3$ $3$	$9$ $9$	$9$ $9$	$8$ $8$
$1$ $1$	$9$ $9$	$9$ $9$	$9$ $9$
$2$ $2$	$3$ $3$	$9$ $9$	$8$ $8$	$8$ $8$

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

$2$ , so the answer must have

2

$2$ decimal places as well.

239.88

$239.88$