Solve the Decimal Equation: Finding the Missing Value in 1.2 - ? = 1.1

Fill in the missing value (?):

1.2−?=1.1 1.2-?=1.1

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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 verify which of them is correct
00:08 Use vertical addition to calculate the problem
00:14 Insert one of the answers into the expression and proceed to calculate
00:38 We can see that the first option doesn't fit, let's move on to the second one:
00:43 Let’s apply the same method as before and proceed to check
00:49 Insert one of the answers into the expression and calculate
01:01 We can see that the second option doesn't fit, let's move on to the third one:
01:07 Once again apply the same method as before and proceed to check
01:14 Insert one of the remaining answers into the expression and calculate
01:29 We can see that the third option fits, let's move on to the fourth one:
01:33 Apply the same method as before and proceed to check
01:41 Insert the remaining answer into the expression and proceed to calculate
01:58 We can see that the fourth option doesn't fit
02:01 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 (?):

1.2−?=1.1 1.2-?=1.1

2

Step-by-step solution

To solve the problem 1.2−?=1.11.2 - ? = 1.1, we need to identify the unknown value represented by the question mark.

Let's go through the solution step-by-step:

  • Step 1: Rewrite the equation in terms of subtraction: 1.2−x=1.11.2 - x = 1.1, where xx is the missing value.

  • Step 2: Rearrange the equation to solve for xx: x=1.2−1.1x = 1.2 - 1.1.

  • Step 3: Perform the subtraction: x=0.1x = 0.1.

  • Step 4: Check the solution by substituting back into the original equation: 1.2−0.1=1.11.2 - 0.1 = 1.1, which is correct.

Therefore, the solution to the problem is that the missing value is 0.10.1.

Given the choices, the correct option is: 0.1 0.1

3

Final Answer

0.1

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