Solve the Decimal Equation: Finding the Missing Value in 0.4 - ? = 0.2

Question

Fill in the missing value (?):

$0.4-?=0.2$

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

00:09 Use vertical addition to calculate the problem

00:17 Insert one of the answers into the expression and proceed to calculate

00:31 We can see that the first option doesn't fit, let's move on to the second one

00:34 Let’s apply the same method as before and proceed to check

00:44 Insert one of the answers into the expression and calculate

01:02 The second option fits, let's move on to the third one

01:09 Once again apply the same method as before and proceed to check

01:16 Insert one of the remaining answers into the expression and calculate

01:31 We can see that the third option doesn't fit, let's move on to the fourth one:

01:39 Apply the same method as before and proceed to check

01:44 Insert the remaining answer into the expression and proceed to calculate

02:04 We can see that the fourth option doesn't fit

02:09 This is the solution

To solve this problem, we'll find the missing value using simple subtraction as follows:

From the choices provided, the correct answer is choice 2: 0.2.

0.2