Basic Math Examples

$12345679 \cdot 9$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply $9$ by $9$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(8)$ . There is one result line for each digit in $9$ .

							$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
								$1$

Step 1.2

Multiply $9$ by $7$ and add the carried $8$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(7)$ . There is one result line for each digit in the $9$ .

						$7$	$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
							$1$	$1$

Step 1.3

Multiply $9$ by $6$ and add the carried $7$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(6)$ . There is one result line for each digit in the $9$ .

					$6$	$7$	$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
						$1$	$1$	$1$

Step 1.4

Multiply $9$ by $5$ and add the carried $6$ . 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 $9$ .

				$5$	$6$	$7$	$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
					$1$	$1$	$1$	$1$

Step 1.5

Multiply $9$ by $4$ and add the carried $5$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(4)$ . There is one result line for each digit in the $9$ .

			$4$	$5$	$6$	$7$	$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
				$1$	$1$	$1$	$1$	$1$

Step 1.6

Multiply $9$ by $3$ and add the carried $4$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(3)$ . There is one result line for each digit in the $9$ .

		$3$	$4$	$5$	$6$	$7$	$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
			$1$	$1$	$1$	$1$	$1$	$1$

Step 1.7

Multiply $9$ by $2$ and add the carried $3$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(2)$ . There is one result line for each digit in the $9$ .

	$2$	$3$	$4$	$5$	$6$	$7$	$8$
	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
		$1$	$1$	$1$	$1$	$1$	$1$	$1$

Step 1.8

Multiply $9$ by $1$ and add the carried $2$ . Place the ones digit $(1)$ in the result line and carry the tens digit $(1)$ . There is one result line for each digit in the $9$ .


	$1$	$2$	$3$	$4$	$5$	$6$	$7$	$9$
$⨯$								$9$
$1$	$1$	$1$	$1$	$1$	$1$	$1$	$1$	$1$

Step 1.9