Pre-Algebra Examples

$\frac{4}{5} \cdot (b - 20)$

Step 1

Apply the distributive property.

$\frac{4}{5} b + \frac{4}{5} \cdot - 20$

Step 2

Combine $\frac{4}{5}$ and $b$ .

$\frac{4 b}{5} + \frac{4}{5} \cdot - 20$

Step 3

Cancel the common factor of $5$ .

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Step 3.1

Factor $5$ out of $- 20$ .

$\frac{4 b}{5} + \frac{4}{5} \cdot (5 (- 4))$

Step 3.2

Cancel the common factor.

$\frac{4 b}{5} + \frac{4}{5} \cdot (5 \cdot - 4)$

Step 3.3

Rewrite the expression.

$\frac{4 b}{5} + 4 \cdot - 4$

$\frac{4 b}{5} + 4 \cdot - 4$

Step 4

Multiply $4$ by $- 4$ .

$\frac{4 b}{5} - 16$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$