Pre-Algebra Examples

$30 - 2^{2} - 9 + \sqrt{9}$

Step 1

Simplify each term.

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Step 1.1

Raise $2$ to the power of $2$ .

$30 - 1 \cdot 4 - 9 + \sqrt{9}$

Step 1.2

Multiply $- 1$ by $4$ .

$30 - 4 - 9 + \sqrt{9}$

Step 1.3

Rewrite $9$ as $3^{2}$ .

$30 - 4 - 9 + \sqrt{3^{2}}$

Step 1.4

Pull terms out from under the radical, assuming positive real numbers.

$30 - 4 - 9 + 3$

Step 2

Simplify by adding and subtracting.

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Step 2.1

Subtract $4$ from $30$ .

$26 - 9 + 3$

Step 2.2

Subtract $9$ from $26$ .

$17 + 3$

Step 2.3

Add $17$ and $3$ .

$20$