Solve the Decimal Equation: Finding the Missing Value in ? + 0.5 = 0.7

Fill in the missing value (?):

?+0.5=0.7 ?+0.5=0.7

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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
00:08 Use vertical addition to calculate the problem
00:12 Insert one of the answers into the expression and proceed to calculate
00:25 We can see that the first option is not suitable, let's move on to the second one:
00:31 Let's apply the same method as before and proceed to check
00:37 Insert one of the answers into the expression and calculate
00:53 We can see that the second option is suitable, let's move to the third one
01:00 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 is not suitable, let's move to the fourth one:
01:31 Apply the same method as before and proceed to check
01:37 Insert the remaining answer into the expression and proceed to calculate
01:53 We can see that the fourth option is not suitable
02:00 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 (?):

?+0.5=0.7 ?+0.5=0.7

2

Step-by-step solution

To solve the equation ?+0.5=0.7 ? + 0.5 = 0.7 , we need to isolate '?'.

  • Step 1: Begin with the equation ?+0.5=0.7 ? + 0.5 = 0.7 .
  • Step 2: To find '?', subtract 0.5 from both sides of the equation.
  • Step 3: Calculate 0.7−0.5 0.7 - 0.5 .

Performing the subtraction:
0.7−0.5=0.2 0.7 - 0.5 = 0.2

Therefore, the value of '?' that makes the equation true is 0.2 0.2 .

This corresponds to choice 2 in the options provided.

3

Final Answer

0.2

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