Basic Math Examples

$(2.5 \cdot 10^{- 8}) (9 \cdot 10^{- 10})$

Step 1

Multiply $2.5$ by $9$ .

$22.5 (10^{- 8} \cdot 10^{- 10})$

Step 2

Multiply $10^{- 8}$ by $10^{- 10}$ by adding the exponents.

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Step 2.1

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$22.5 \cdot 10^{- 8 - 10}$

Step 2.2

Subtract $10$ from $- 8$ .

$22.5 \cdot 10^{- 18}$

Step 3

Move the decimal point in $22.5$ to the left by $1$ place and increase the power of $10^{- 18}$ by $1$ .

$2.25 \cdot 10^{- 17}$