Basic Math Examples

$9 \cdot 45$

Step 1

Multiply using long multiplication.

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Step 1.1

Multiply

$5$ by

$9$ . Place the ones digit

$(5)$ in the result line and carry the tens digit

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

$45$ .

Step 1.2

Multiply

$4$ by

$9$ . Place the ones digit

$(6)$ in the result line and carry the tens digit

$(3)$ . There is one result line for each digit in

$45$ .

Step 1.3

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

$5 + 0$ , then place the

$5$ in the result line.

Step 1.4

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

$4 + 6$ , then place the

$0$ in the result line and carry the

$1$ .

Step 1.5

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

$0 + 3 + 1$ , then place the

$4$ in the result line.

Step 2

The result of

$9 \cdot 45$ is

$405$ .

$405$