Basic Math Examples

$r + \frac{1}{3} r$

Step 1

Combine $\frac{1}{3}$ and $r$ .

$r + \frac{r}{3}$

Step 2

To write $r$ as a fraction with a common denominator, multiply by $\frac{3}{3}$ .

$r \cdot \frac{3}{3} + \frac{r}{3}$

Step 3

Simplify terms.

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Step 3.1

Combine $r$ and $\frac{3}{3}$ .

$\frac{r \cdot 3}{3} + \frac{r}{3}$

Step 3.2

Combine the numerators over the common denominator.

$\frac{r \cdot 3 + r}{3}$

Step 4

Simplify the numerator.

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Step 4.1

Move $3$ to the left of $r$ .

$\frac{3 \cdot r + r}{3}$

Step 4.2

Add $3 r$ and $r$ .

$\frac{4 r}{3}$