Solve for Missing Addend: 0.3 + ? = 0.8

Video Solution

Solution Steps

00:00 Choose the correct answer

00:03 Let's write down each option and check

00:10 We'll use long-form calculation

00:13 Let's calculate and write it down

00:32 We see that the first option fits, let's move to the second

00:41 Again we'll use the same method and check

00:52 Let's calculate and write it down

01:03 We see that the second option doesn't fit, let's move to the third:

01:12 Again we'll use the same method and check

01:20 Let's calculate and write it down

01:35 We see that the third option fits, let's move to the fourth:

01:45 Again we'll use the same method and check

01:53 Let's calculate and write it down

02:03 We see that the fourth option doesn't fit

02:08 And this is the solution to the question

Step-by-Step Solution

Let's work through the solution by performing the necessary calculation:

Step 1: Identify the known values:
The equation provided is $0.3 + ? = 0.8$ .
Step 2: Use the subtraction operation to solve for the missing number, ?:
We need to subtract $0.3$ from $0.8$ .

Calculation:
$\text{?} = 0.8 - 0.3$

We perform the subtraction as follows:

Thus, the missing number is $\textbf{0.5}$ .

Therefore, the correct answer is $\textbf{0.5}$ .