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

To solve the problem $1.2 - ? = 1.1$, 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: $1.2 - x = 1.1$, where $x$ is the missing value.

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

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

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

Therefore, the solution to the problem is that the missing value is $0.1$.

Given the choices, the correct option is: $0.1$