Pre-Algebra Examples

18 \cdot 5

$18 \cdot 5$

Step 1

Multiply using long multiplication.

Tap for more steps...

Step 1.1

Multiply

5

$5$ by

8

$8$ . Place the ones digit

(0)

$(0)$ in the result line and carry the tens digit

(4)

$(4)$ . There is one result line for each digit in

5

$5$ .

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

Step 1.2

Multiply

5

$5$ by

1

$1$ and add the carried

4

$4$ . Place the result in the next column in the result line. There is one result line for each digit in

5

$5$ .


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

Step 1.3

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

0

$0$ , then place the

0

$0$ in the result line.


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

Step 1.4

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

9

$9$ , then place the

9

$9$ in the result line.


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


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

Step 2

The result of

18 \cdot 5

$18 \cdot 5$ is

90

$90$ .

90

$90$

18 \cdot 5

$18 \cdot 5$

(

)

[

]

√



≥















≤





































