Solve for the Missing Number: ? + 3.3 = 6.7

Video Solution

Solution Steps

00:00 Identify which of the following answers is correct

00:03 Insert each of the potential answers into the expression in order to verify which of them is correct

00:07 Use vertical addition to calculate the problem

00:11 Insert one of the answers into the expression and proceed to calculate

00:27 We can see that the first option doesn't fit, let's move on to the second one

00:35 Let's apply the same method as before and proceed to check

00:41 Insert one of the answers into the expression and calculate

00:54 We can see that the second option doesn't fit, let's move on to the third one:

01:03 Once again apply the same method as before and proceed to check

01:10 Insert one of the remaining answers into the expression and calculate

01:24 We can see that the third option doesn't fit, let's move on to the fourth and final one:

01:33 Apply the same method as before and proceed to check

01:41 Insert the remaining answer into the expression and calculate

01:55 We can see that the fourth option fits

02:01 This is the solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

Step 1: Understand the equation $? + 3.3 = 6.7$ .
Step 2: Rewrite the equation to solve for the missing value as $? = 6.7 - 3.3$ .
Step 3: Perform the subtraction to find the value of ?.

Begin by setting up the equation:
$\, ? + 3.3 = 6.7$
To solve for $?$ , we rearrange the equation: $? = 6.7 - 3.3$

Perform the subtraction:
$6.7 - 3.3 = 3.4$

Thus, the missing value is 3.4. Hence, $? = 3.4$ .

Therefore, the correct choice from the given options is choice 4: 3.4, which matches our calculated result.