Solve Decimal Addition: 0.5 + 0.9 Using Number Line Method

To solve the problem of adding $0.5$ and $0.9$, we follow these steps:

• Step 1: Write the numbers vertically and align the decimal points:

$\begin{array}{c} 0.5 \\ +0.9 \\ \hline \end{array}$

• Step 2: Add the numbers starting from the rightmost digit:

The digit after the decimal in $0.5$ is $5$, and in $0.9$ it is $9$.
Adding these, $5 + 9 = 14$. Write down $4$ and carry over $1$.

• Step 3: Add the numbers before the decimal point with the carryover:

Since $0.5$ has $0$ and $0.9$ has $0$ before the decimal, add these along with the carryover. $0 + 0 + 1 = 1$

Thus, when we perform the addition, we find the result is $1.4$.

Therefore, the solution to the problem is $1.4$.