Solve the Decimal Equation: Finding the Missing Value in ? + 2.4 = 4.5

Fill in the missing value (?):

?+2.4=4.5 ?+2.4=4.5

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Identify which of the following answers is correct
00:03 Insert each of the potential answers into the expression in order to identify which of them is correct
00:10 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 is not suitable, let's move on to the second one
00:36 Let's apply the same method as before and proceed to check
00:45 Insert one of the answers into the expression and calculate
01:00 We can see that the second option is suitable, let's move on to the third one
01:06 Once again apply the same method as before and proceed to check
01:15 Insert one of the remaining answers into the expression and calculate
01:29 We can see that the third option is not suitable, let's move to the fourth one:
01:36 Apply the same method as before and proceed to check
01:43 Insert the remaining answer into the expression and proceed to calculate
01:58 We can see that the fourth option is not suitable
02:04 This is the solution

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Fill in the missing value (?):

?+2.4=4.5 ?+2.4=4.5

2

Step-by-step solution

Let's solve the problem step by step:

  • Step 1: Identify the equation.
    The equation is ?+2.4=4.5 ? + 2.4 = 4.5 .
  • Step 2: Isolate the missing value.
    To find the missing number, subtract 2.4 from both sides.
  • Step 3: Perform the subtraction.
    The calculation is 4.5−2.4 4.5 - 2.4 .
  • Step 4: Calculate the difference.
    Start with the tenths place: 5−4=1 5 - 4 = 1 in the tenths place.
    Subtract the whole numbers: 4−2=2 4 - 2 = 2 . Thus, the complete subtraction is 2.1 2.1 .

Therefore, the missing value that satisfies the equation ?+2.4=4.5 ? + 2.4 = 4.5 is 2.1 2.1 .

3

Final Answer

2.1

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