Complete the Decimal Expression: Finding the Value of 1.9

We are tasked with converting the decimal number $1.9$ into a mixed number.

• Step 1: Identify the whole number part of $1.9$. The digit to the left of the decimal point is $1$.
• Step 2: Identify the fractional part of $1.9$. The digit to the right of the decimal point is $9$. This represents $\frac{9}{10}$.
• Step 3: Combine the whole number and the fractional part to form a mixed number. Therefore, $1.9 = 1\frac{9}{10}$.

Hence, the mixed number equivalent of the decimal $1.9$ is $1\frac{9}{10}$.