Question

Fill in the blank:

$\frac{7}{9}+\frac{-2}{9}=..............$

Answer 1

Given, $\frac{7}{9}+\frac{-2}{9}$

We know that, on adding two rational numbers with the same denominator, keep the denominators common and add the numerators of the rational number.

Since the denominators are equal,

$\begin{array}{rcl}\therefore \frac{7}{9}+\frac{-2}{9}& =& \frac{7+\left(-2\right)}{9}\\ & =& \frac{7-2}{9}\\ & =& \frac{5}{9}\end{array}$

Therefore, $\frac{7}{9}+\frac{-2}{9}=\frac{5}{9}$