Solve for Missing Addend: 0.3 + ? = 0.8

Video Solution

Solution Steps

00:05 Let's choose the correct answer together!

00:08 First, we'll write down each option and check them one by one.

00:15 We'll do calculations step-by-step. Ready?

00:19 Let's calculate and write it down clearly.

00:37 Great! The first option fits. Now, let's try the second option.

00:46 We'll use the same method to check this one.

00:57 Calculate carefully and let's write it down.

01:08 Oops, the second option doesn't fit. Let's move to the third.

01:17 Again, use the same method to check the third option.

01:25 Calculate and write it down thoroughly.

01:40 The third option fits doesn't fit. Let's try the fourth.

01:50 Once more, use the same method to check the fourth option.

01:58 Let's calculate accurately and note it down.

02:08 Looks like the fourth option doesn't fit.

02:13 And that's the solution to our 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 $\textbf{0.5}$ .