Solve Decimal Addition: Finding Missing Number in 0.31 + _ = 0.45

To solve the problem, we need to determine the value of the missing number that completes the equation $0.31 + \_ = 0.45$.

We'll follow these steps:

• Subtract $0.31$ from $0.45$ to find the missing number.

Now, let's work through the solution:

Step 1: Perform the subtraction:

$0.45 - 0.31 = 0.14$

Therefore, the missing number is $0.14$. This is the value that, when added to $0.31$, results in $0.45$.

The correct choice from the given options is $0.14$.