4/5+1/10

Let's evaluate: $\frac{4}{5}+\frac{1}{10}$

ⓘ To add fractions, put them over the same denominator, then add the numerators. We choose $10$, the least common multiple of $5$ and $10$. Multiplying the numerator and the denominator by the same number does not change the fraction: $\frac{4}{5}+\frac{1}{10}$ = $\frac{4\times 2}{5\times 2}+\frac{1}{10}$ = $\frac{4\times 2+1}{10}$

$\frac{4\times 2+1}{10}$

ⓘ Multiplications are done before additions and subtractions: $4\times 2$ = $8$

$\frac{8+1}{10}$

ⓘ Calculate the numerator and denominator before dividing: $8+1$ = $9$

▶Result:   $\frac{9}{10}$

The numeric value of: $\frac{9}{10}$ is:

▷ $0.9$