Basic Math Examples

20 \cdot 7

$20 \cdot 7$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

7

$7$ by

0

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

7

$7$ .


	$2$ $2$	$0$ $0$
$⨯$ $⨯$		$7$ $7$
		$0$ $0$

Step 1.2

Multiply

7

$7$ by

2

$2$ . Place the ones digit

(4)

$(4)$ in the result line and carry the tens digit

(1)

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

7

$7$ .


	$2$ $2$	$0$ $0$
$⨯$ $⨯$		$7$ $7$
$1$ $1$	$4$ $4$	$0$ $0$

Step 1.3

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

0

$0$ , then place the

0

$0$ in the result line.


	$2$ $2$	$0$ $0$
$⨯$ $⨯$		$7$ $7$
$1$ $1$	$4$ $4$	$0$ $0$
		$0$ $0$

Step 1.4

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

4

$4$ , then place the

4

$4$ in the result line.


	$2$ $2$	$0$ $0$
$⨯$ $⨯$		$7$ $7$
$1$ $1$	$4$ $4$	$0$ $0$
	$4$ $4$	$0$ $0$

Step 1.5

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

1

$1$ , then place the

1

$1$ in the result line.


	$2$ $2$	$0$ $0$
$⨯$ $⨯$		$7$ $7$
$1$ $1$	$4$ $4$	$0$ $0$
$1$ $1$	$4$ $4$	$0$ $0$


	$2$ $2$	$0$ $0$
$⨯$ $⨯$		$7$ $7$
$1$ $1$	$4$ $4$	$0$ $0$
$1$ $1$	$4$ $4$	$0$ $0$

Step 2

The result of

20 \cdot 7

$20 \cdot 7$ is

140

$140$ .

140

$140$

20 \cdot 7

$20 \cdot 7$

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